| lyme disease and migrating birds in the saint croix river valley. | during a study of migrating land birds in 1987, we examined over 9,200 individual birds representing 99 species from the saint croix river valley, a lyme disease-endemic area of east central minnesota and northwestern wisconsin. we found that 250 deer tick (ixodes dammini) larvae and nymphs infested 58 birds from 15 migrant species; 56 ticks (22.4%) were positive for the lyme disease spirochete borrelia burgdorferi. five ground-foraging migrant bird species favoring mesic habitats, veery (cathar ... | 1989 | 2782872 |
| ticks (acari: ixodidae) infesting wild birds (aves) and white-footed mice in lyme, ct. | birds were captured and recaptured (20.8% of 5,297) with japanese mist nets, and white-footed mice, peromyscus leucopus (rafinesque), were caught and recaught (69.1% of 355) with sherman box traps during the late spring, summer, and early fall from july 1989 through october 1991 to study tick-host relationships in lyme, ct. ixodes scapularis say, a vector of lyme disease spirochetes, borrelia burgdorferi sensu stricto johnson, schmid, hye, steigerwalt & brenner, infested 803 birds (15.2%) in 36 ... | 1995 | 7650706 |
| molecular identification of blood-meal sources in culiseta melanura and culiseta morsitans from an endemic focus of eastern equine encephalitis virus in new york. | eastern equine encephalitis (eee) virus perpetuates in an enzootic cycle involving ornithophilic mosquito vectors, principally culiseta melanura (coquillett) and avian amplification hosts. to better understand the role of cs. melanura and culiseta morsitans (theobald) in the epizootiology of eee virus, we collected blood-fed mosquitoes between 31 may and 15 october 2004 at two sites associated with an eee virus focus in central new york and identified the source of vertebrate blood by nucleotide ... | 2006 | 17172382 |
| terrestrial liming benefits birds in an acidified forest in the northeast. | studies in europe have reported negative effects of acid deposition on forest birds, and research in north america has identified links between forest bird abundance and rates of acid deposition. we examined the bird community in an acidified forest in central pennsylvania (usa) and evaluated the effects of terrestrial lime application on birds. we used a before-after control-impact (baci) study design, with one year of observation before (2003) and three years after lime application (2004, 2005 ... | 2007 | 18213962 |
| enso, nest predation risk, food abundance, and male status fail to explain annual variations in the apparent survival rate of a migratory songbird. | adult mortality can be a major driver of population decline in species whose productivity is relatively low. yet, little is known about the factors influencing adult survival rates in migratory bird species, nor do we know much about the longer-term effects of habitat disturbance on the fitness of individuals. the ovenbird (seiurus aurocapilla) is one of the vertebrate species most sensitive to forest management, yet it is still common and widespread. we monitored the fate of 330 colour-banded o ... | 2014 | 25419839 |
| image texture predicts avian density and species richness. | for decades, ecologists have measured habitat attributes in the field to understand and predict patterns of animal distribution and abundance. however, the scale of inference possible from field measured data is typically limited because large-scale data collection is rarely feasible. this is problematic given that conservation and management typical require data that are fine grained yet broad in extent. recent advances in remote sensing methodology offer alternative tools for efficiently chara ... | 2013 | 23675463 |
| a novel isospora species (apicomplexa: eimeriidae) from warblers (passeriformes: parulidae) of costa rica. | five of 16 (31%) rufous-capped warblers (basileuterus rufifrons) and 2 of 5 (40%) ovenbirds ( seiurus aurocapilla ) sampled from costa rica were positive for a novel species of isospora. oocysts have a thin, smooth, double-layered, colorless wall and measure 22.3 μm ± 1.6 μm × 24.3 μm ± 1.5 μm (19-25 μm × 21-28 μm) with an average length-width (l/w) ratio of 1.0 (1-1.3). oocyst residuum and micropyle are absent, but 0-4 spherical to cigar-shaped polar granules (1-2.5 μm) are present. sporocysts ... | 2014 | 24456073 |
| nesting songbirds assess spatial heterogeneity of predatory chipmunks by eavesdropping on their vocalizations. | 1. information benefits organisms living in a heterogeneous world by reducing uncertainty associated with decision making. for breeding passerines, information reliably associated with nest failure, such as predator activity, can be used to adjust breeding decisions leading to higher reproductive success. 2. predator vocalizations may provide a source of current information for songbirds to assess spatial heterogeneity in risk that enables them to make appropriate nest-site and territory placeme ... | 2011 | 21699539 |
| reduced density and nest survival of ground-nesting songbirds relative to earthworm invasions in northern hardwood forests. | european earthworms (lumbricus spp.) are spreading into previously earthworm-free forests in the united states and canada and causing substantial changes, including homogenization of soil structure, removal of the litter layer, and reduction in arthropod abundance and species richness of understory plants. whether these changes affect songbirds that nest and forage on the forest floor is unknown. in stands with and without earthworms in the chequamegon-nicolet national forest, wisconsin (u.s.a.) ... | 2011 | 21797927 |
| quantitative magnetic resonance analysis and a morphometric predictive model reveal lean body mass changes in migrating nearctic-neotropical passerines. | most studies of lean mass dynamics in free-living passerine birds have focused on old world species at geographical barriers where they are challenged to make the longest non-stop flight of their migration. we examined lean mass variation in new world passerines in an area where the distribution of stopover habitat does not require flights to exceed more than a few hours and most migrants stop flying well before fat stores near exhaustion. we used either quantitative magnetic resonance (qmr) ana ... | 2011 | 21079970 |
| linking breeding and wintering grounds of neotropical migrant songbirds using stable hydrogen isotopic analysis of feathers. | recent studies have shown that stable hydrogen isotope ratios (δd) in the tissues of animals often correlate with δd of local precipitation. here we examined the relationship between δd in feathers and growing season precipitation for neotropical migrant songbirds breeding over a continent-wide isotopic gradient. δd values were determined on feathers of 140 individuals of 6 species of wild insectivorous forest songbirds (setophaga ruticilla, empidonax minimus, vermivora peregrinus, catharus ustu ... | 1996 | 28307604 |
| a meta-analysis of bird responses to uniform partial harvesting across north america. | most data on the effects of partial-harvest silviculture (where live trees are purposely retained at the time of harvest) on birds come from one or a few discrete harvesting treatments. it is thus difficult to infer species responses across a continuous gradient of tree retention from individual studies. to quantify the levels of tree retention expected to produce specified changes in the relative abundance of individual species, we carried out a meta-analysis of 42 studies that examined the imp ... | 2007 | 17883488 |
| paraphyly of cinclodes fuscus (aves: passeriformes: furnariidae): implications for taxonomy and biogeography. | the andes are a hotspot of global avian diversity, but studies on the historical diversification of andean birds remain relatively scarce. evolutionary studies on avian lineages with andean-patagonian distributions have focused on reconstructing species-level phylogenies, whereas no detailed phylogeographic studies on widespread species have been conducted. here, we describe phylogeographic patterns in the bar-winged cinclodes (cinclodes fuscus), a widespread and common species of ovenbird (furn ... | 2009 | 19580881 |
| dietary and isotopic specialization: the isotopic niche of three cinclodes ovenbirds. | by comparing the isotopic composition of tissues deposited at different times, we can identify individuals that shift diets over time and individuals with constant diets. we define an individual as an isotopic specialist if tissues deposited at different times have similar isotopic composition. if tissues deposited at different times differ in isotopic composition we define an individual as an isotopic generalist. individuals can be dietary generalists but isotopic specialists if they feed on th ... | 2009 | 19424728 |
| effects of restoring oak savannas on bird communities and populations. | efforts to restore and maintain oak savannas in north america, with emphasis on the use of prescribed fire, have become common. little is known, however about how restoration affects animal populations, especially those of birds. i compared the breeding densities, community structure, and reproductive success of birds in oak savannas maintained by prescribed fire (12 sites) with those in closed-canopy forests (13 sites). all sampling was conducted in illinois (u.s.a.). of the 31 bird species ana ... | 2006 | 16903107 |
| species-specific variation in nesting and postfledging resource selection for two forest breeding migrant songbirds. | habitat selection is a fundamental component of community ecology, population ecology, and evolutionary biology and can be especially important to species with complex annual habitat requirements, such as migratory birds. resource preferences on the breeding grounds may change during the postfledging period for migrant songbirds, however, the degree to which selection changes, timing of change, and whether all or only a few species alter their resource use is unclear. we compared resource select ... | 2017 | 28614414 |
| factors affecting aural detections of songbirds. | many factors affect the number of birds detected on point count surveys of breeding songbirds. the magnitude and importance of these factors are not well understood. we used a bird song simulation system to quantify the effects of detection distance, singing rate, species differences, and observer differences on detection probabilities of birds detected by ear. we simulated 40 point counts consisting of 10 birds per count for five primary species (black-and-white warbler mniotilta varia, black-t ... | 2007 | 17494409 |
| molecular systematics of new world suboscine birds. | phylogenetic relationships among new world suboscine birds were studied using nuclear and mitochondrial dna sequences. new world suboscines were shown to constitute two distinct lineages, one apparently consisting of the single species sapayoa aenigma, the other made up of the remaining 1000+ species of new world suboscines. with the exception of sapayoa, monophyly of new world suboscines was strongly corroborated, and monophyly within new world suboscines of a tyrannoid clade and a furnarioid c ... | 2004 | 15186793 |
| review of the species of rallicola (phthiraptera: philopteridae) from the antbirds, ovenbirds, and tapaculos (passeriformes). | fourteen species of chewing lice in the genus rallicola are recognized and described from members of the passerine families thamnophilidae, furnariidae (subfamily furnariinae), and rhinocryptidae. these include 10 previously described species and four new ones: r. mooreae from premnoplex brunnescens (sclater), r. leeae from thripadectes melanorhynchus (tschudi), r. tompkinsi from sclerurus caudacutus (vieillot), and r. hambleri from syndactyla rufosuperciliata (lafresnaye). new synonymies includ ... | 1994 | 7966166 |
| phylogeography of a migratory songbird across its canadian breeding range: implications for conservation units. | the objectives of this study were to describe and evaluate potential drivers of genetic structure in canadian breeding populations of the ovenbird, seiurus aurocapilla. we performed genetic analyses on feather samples of individuals from six study sites using nuclear microsatellites. we also assessed species identity and population genetic structure of quill mites (acariformes, syringophilidae). for male ovenbirds breeding in three study sites, we collected light-level geolocator data to documen ... | 2017 | 28861214 |
| niche evolution and diversification in a neotropical radiation of birds (aves: furnariidae). | rapid diversification may be caused by ecological adaptive radiation via niche divergence. in this model, speciation is coupled with niche divergence and lineage diversification is predicted to be correlated with rates of niche evolution. studies of the role of niche evolution in diversification have generally focused on ecomorphological diversification but climatic-niche evolution may also be important. we tested these alternatives using a phylogeny of 298 species of ovenbirds (aves: furnariida ... | 2017 | 28071791 |
| migratory connectivity of a neotropical migratory songbird revealed by archival light-level geolocators. | understanding migratory connectivity is critical for interpreting population dynamics, seasonal interactions, and for the implementation of conservation strategies of migratory species. we evaluated the migratory connectivity of a neotropical migratory songbird, the ovenbird (seiurus aurocapilla) using archival light-level geolocators deployed at two breeding and four nonbreeding locations while incorporating ovenbird abundance as prior information using bayes' rule. we also included band recove ... | 2015 | 26263658 |
| historical biogeography using species geographical ranges. | spatial variation in biodiversity is the result of complex interactions between evolutionary history and ecological factors. methods in historical biogeography combine phylogenetic information with current species locations to infer the evolutionary history of a clade through space and time. a major limitation of most methods for historical biogeographic inference is the requirement of single locations for terminal lineages, reducing contemporary species geographical ranges to a point in two-dim ... | 2015 | 26254671 |
| miniaturized gps tags identify non-breeding territories of a small breeding migratory songbird. | for the first time, we use a small archival global positioning system (gps) tag to identify and characterize non-breeding territories, quantify migratory connectivity, and identify population boundaries of ovenbirds (seiurus aurocapilla), a small migratory songbird, captured at two widely separated breeding locations. we recovered 15 (31%) gps tags with data and located the non-breeding territories of breeding ovenbirds from maryland and new hampshire, usa (0.50 ± 0.15 ha, mean ± se). all non-br ... | 2015 | 26057892 |
| does exurban housing development affect the physiological condition of forest-breeding songbirds? a case study of ovenbirds (seiurus aurocapillus) in the largest protected area in the contiguous united states. | exurban development (low-density development in rural areas) can significantly alter wildlife community composition, but it is largely unknown whether it also affects wildlife at the individual level. we investigated individual-level impacts of exurban development in new york state's adirondack park by comparing the physiological condition of 62 male ovenbirds (seiurus aurocapillus) breeding in forests with low-density housing development with those in contiguous forests. we used hematocrit (hct ... | 2015 | 26052638 |
| reconciling diversification: random pulse models of speciation and extinction. | inferring the underlying speciation-extinction dynamics of a clade from the phylogenetic relationships of contemporary species has proven difficult, primarily because the record of extinction is absent. moreover, models of diversification tend to emphasize either time homogeneity or gradual trends in speciation and extinction rates. in contrast, the fossil records of many groups exhibit repeated increase and decrease of species richness within clades. modeling this dynamic in the structure of ph ... | 2014 | 25058286 |
| tracking natal dispersal in a coastal population of a migratory songbird using feather stable isotope (δ2h, δ34s) tracers. | adult birds tend to show high fidelity to their breeding territory or disperse over relatively short distances. gene flow among avian populations is thus expected to occur primarily through natal dispersal. although natal dispersal is a critical demographic process reflecting the area over which population dynamics take place, low recapture rates of birds breeding for the first time have limited our ability to reliably estimate dispersal rates and distances. stable isotope approaches can elucida ... | 2014 | 24740314 |
| species coexistence and the dynamics of phenotypic evolution in adaptive radiation. | interactions between species can promote evolutionary divergence of ecological traits and social signals, a process widely assumed to generate species differences in adaptive radiation. however, an alternative view is that lineages typically interact when relatively old, by which time selection for divergence is weak and potentially exceeded by convergent selection acting on traits mediating interspecific competition. few studies have tested these contrasting predictions across large radiations, ... | 2014 | 24362572 |
| adult ovenbirds (seiurus aurocapilla) show increased stress-responsiveness in logged forests. | forest harvesting is a form of anthropogenic disturbance, yet the effects of such disturbance on the endocrine physiology of wildlife have been infrequently studied. we investigated the effect of two methods of forest harvesting ('intensive' and 'typical' group-selection silviculture) and un-harvested control sites on the glucocorticoid levels of adult ovenbirds (seiurus aurocapilla), a forest interior bird species. we collected blood samples from adult males immediately after capture to examine ... | 2013 | 24140427 |
| estimating landscape carrying capacity through maximum clique analysis. | habitat suitability (hs) maps are widely used tools in wildlife science and establish a link between wildlife populations and landscape pattern. although hs maps spatially depict the distribution of optimal resources for a species, they do not reveal the population size a landscape is capable of supporting--information that is often crucial for decision makers and managers. we used a new approach, "maximum clique analysis," to demonstrate how hs maps for territorial species can be used to estima ... | 2012 | 23387124 |
| a genetic polymorphism in the sex-linked atp5a1 gene is associated with individual fitness in ovenbirds (seiurus aurocapilla). | while testing genetic sexing techniques in ovenbirds (seiurus aurocapilla), we found a genetic polymorphism in the atp5a1 gene in 38% of individuals. the z' allele included changes in both intronic and exonic portions of the sequenced region, but there was no evidence that this changed the resulting atp synthase product. males that had one or more copies of this allele had higher relative body mass (mass corrected for size) than other genotypes. this allele was unrelated to stable isotope signat ... | 2012 | 22833803 |
| logging affects fledgling sex ratios and baseline corticosterone in a forest songbird. | silviculture (logging) creates a disturbance to forested environments. the degree to which forests are modified depends on the logging prescription and forest stand characteristics. in this study we compared the effects of two methods of group-selection ("moderate" and "heavy") silviculture (gss) and undisturbed reference stands on stress and offspring sex ratios of a forest interior species, the ovenbird (seiurus aurocapilla), in algonquin provincial park, canada. blood samples were taken from ... | 2012 | 22432000 |
| lineage diversification and morphological evolution in a large-scale continental radiation: the neotropical ovenbirds and woodcreepers (aves: furnariidae). | patterns of diversification in species-rich clades provide insight into the processes that generate biological diversity. we tested different models of lineage and phenotypic diversification in an exceptional continental radiation, the ovenbird family furnariidae, using the most complete species-level phylogenetic hypothesis produced to date for a major avian clade (97% of 293 species). we found that the furnariidae exhibit nearly constant rates of lineage accumulation but show evidence of const ... | 2011 | 21967436 |
| stereotyped and non-stereotyped features of the temporal patterning of singing sessions in the ovenbird seiurus auricapillus. | temporal patterning of recorded singing sessions of 26 different male ovenbirds seiurus auricapillus (fringillidae: parulini) was analyzed computationally, in order to test whether differences among songs are potentially informative or merely reflect performance errors. repeated songs within a singing session by a given male showed relatively little inter-individual variation in the duration of the song or in the number of units composing it, although these features varied substantially among in ... | 2011 | 21356282 |
| age-specific response of a migratory bird to an experimental alteration of its habitat. | 1. recruitment, i.e. the influx of new breeding individuals into a population, is an important demographic parameter, especially in species with a short life span. few studies have measured this parameter in solitary-breeding animal populations even though it may yield critical information on habitat suitability and functional connectivity. 2. using a before-after, control-impact pairs (bacip) experimental design, we measured: (i) the return rate and apparent survival rate of individually marked ... | 2010 | 20443989 |
| convergent evolution, habitat shifts and variable diversification rates in the ovenbird-woodcreeper family (furnariidae). | the neotropical ovenbird-woodcreeper family (furnariidae) is an avian group characterized by exceptionally diverse ecomorphological adaptations. for instance, members of the family are known to construct nests of a remarkable variety. this offers a unique opportunity to examine whether changes in nest design, accompanied by expansions into new habitats, facilitates diversification. we present a multi-gene phylogeny and age estimates for the ovenbird-woodcreeper family and use these results to es ... | 2009 | 19930590 |
| putting density back into the habitat-quality equation: case study of an open-nesting forest bird. | ecological traps and other cases of apparently maladaptive habitat selection cast doubt on the relevance of density as an indicator of habitat quality. nevertheless, the prevalence of these phenomena remains poorly known, and density may still reflect habitat quality in most systems. we examined the relationship between density and two other parameters of habitat quality in an open-nesting passerine species: the ovenbird (seiurus aurocapilla). we hypothesized that the average individual bird mak ... | 2009 | 19558524 |
| fourfold polyphyly of the genus formerly known as upucerthia, with notes on the systematics and evolution of the avian subfamily furnariinae. | the traditional avian subfamily furnariinae, a group of terrestrial ovenbirds typical of the andean and patagonian arid zones, consists of the genera furnarius, cinclodes, geositta, upucerthia, chilia, and eremobius. we investigated phylogenetic relationships within the furnariinae, with particular attention to the nine species of the genus upucerthia, using nuclear and mitochondrial dna sequences from all genera in the subfamily. upucerthia was found to be highly polyphyletic, its constituent s ... | 2007 | 17632018 |
| independent effects of fragmentation on forest songbirds: an organism-based approach. | the degree to which spatial patterns influence the dynamics and distribution of populations is a central question in ecology. this question is even more pressing in the context of rapid habitat loss and fragmentation, which threaten global biodiversity. however, the relative influence of habitat loss and landscape fragmentation, the spatial patterning of remaining habitat, remains unclear. if landscape pattern affects population size, managers may be able to design landscapes that mitigate habit ... | 2006 | 16827004 |
| food supply controls the body condition of a migrant bird wintering in the tropics. | the hypothesis that migratory bird populations are limited during the non-breeding season is increasingly supported by empirical studies that also suggest consequences that carry-over into subsequent seasons. although variation in food supply is the best supported explanation for non-breeding season limitation, the ecological mechanisms and physiological consequences are not well understood. we both supplemented and reduced ovenbird (seiurus aurocapilla) food availability on replicate plots in j ... | 2006 | 16639569 |
| coping with salt without salt glands: osmoregulatory plasticity in three species of coastal songbirds (ovenbirds) of the genus cinclodes (passeriformes: furnariidae). | we investigated the phenotypic plasticity of renal function in three south american coastal passerine cinclodes (ovenbirds) differing in the proportion of marine prey they consume. individuals were acclimated to two regimes of salinity for 15 days, and then the maximal urine-concentrating ability (umax), hematological parameters and kidney morphology of each species were determined. the proportion of kidney mass occupied by medullary tissue, the number of medullary cones in the kidneys, plasma o ... | 2004 | 15127216 |
| systematic relationships and biogeography of the tracheophone suboscines (aves: passeriformes). | based on their highly specialized "tracheophone" syrinx, the avian families furnariidae (ovenbirds), dendrocolaptidae (woodcreepers), formicariidae (ground antbirds), thamnophilidae (typical antbirds), rhinocryptidae (tapaculos), and conopophagidae (gnateaters) have long been recognized to constitute a monophyletic group of suboscine passerines. however, the monophyly of these families have been contested and their interrelationships are poorly understood, and this constrains the possibilities f ... | 2002 | 12099801 |
| physiological ramifications of habitat selection in territorial male ovenbirds: consequences of landscape fragmentation. | since boreal forest fragments are of lower quality than contiguous forest for breeding ovenbirds (seiurus aurocapillus), we predicted that competition for breeding sites in contiguous forest should lead to a greater prevalence of individuals in better condition in these habitats. we quantified male condition using morphological and hematological indices. males in contiguous forest were larger than males in forest fragments and had higher hematocrits and mean corpuscular volumes, as well as a gre ... | 2002 | 28547041 |
| the effect of predation on begging-call evolution in nestling wood warblers. | i combined a comparative study of begging in ground- and tree-nesting wood warblers (parulidae) with experimental measures of the predation costs of warbler begging calls. throughout their development, ground-nesting warbler nestlings had significantly higher-frequency begging calls than did tree-nesting warblers. there was also a trend for ground-nesting birds to have less rapidly modulated calls. there were no consistent associations between nesting site and the amplitude of the calls. using m ... | 1999 | 10202097 |
| stopover and fat deposition by north american wood-warblers (parulinae) following spring migration over the gulf of mexico. | length of stopover and rate of weight gain (fat deposition) were studied in several species of passerine birds that stopped in southwestern louisiana along the northern coast of the gulf of mexico after a trans-gulf flight. fatdepleted birds were more common among the birds that arrived at our study site in southwest louisiana, though variability characterized our samples. migrants that landed after encountering opposing winds or rain over the northern gulf of mexico were, on average, fatter tha ... | 1987 | 28310413 |
| linking songbird nest predation to seedling density: sugar maple masting as a resource pulse in a forest food web. | the ecological literature presents considerable evidence for top-down forcing on the maintenance of species diversity. yet, in temperate forests, bottom-up forces often exert a strong influence on ecosystem functioning. here, we report on the indirect influence of a pulsed resource, sugar maple (acer saccharum) seed production, on nest survival in a migratory songbird. we hypothesized that seed production in year t would determine daily nest survival rate in year t + 1 through its effects on see ... | 2017 | 29299253 |
| new feather mites of the genus <i>amerodectes</i> valim and hernandes (acariformes: proctophyllodidae) from passerines (aves: passeriformes) in georgia, usa. | eight new species of the feather mite genus amerodectes valim and hernandes, 2010 (proctophyllodidae: pterodectinae) are described from passerines (aves: passeriformes) in georgia, usa: amerodectes cathari sp. n. from catharus ustulatus (nuttall) (turdidae), a. haemorhous sp. n. from haemorhous mexicanus (muller, pls) (fringillidae), a. helmitheros sp. n. from helmitheros vermivorum (gmelin) (parulidae), a. hribari sp. n. from geothlypis trichas (linnaeus) (parulidae), a. hylocichlae sp. n. from ... | 2017 | 29245629 |
| feather mites of the genus trouessartia (acariformes: trouessartiidae) from passerines (aves: passeriformes) in georgia, usa. | ten new species of the feather mite genus trouessartia canestrini, 1899 (analgoidea: trouessartiidae) are described from various passerines of the superfamily passeroidea in georgia: trouessartia americana sp. n. from setophaga americana (linnaeus), t. helmitheros sp. n. from helmitheros vermivorum (gmelin, jf), t. mniotilta sp. n. from mniotilta varia (linnaeus), t. pensylvanica sp. n. from setophaga pensylvanica (linnaeus) (type host) and s. palmarum (gmelin, jf), t. ruticilla sp. n. from s. r ... | 2020 | 33056170 |
| validation prediction: a flexible protocol to increase efficiency of automated acoustic processing for wildlife research. | automated recognition is increasingly used to extract species detections from audio recordings; however, the time required to manually review each detection can be prohibitive. we developed a flexible protocol called "validation prediction" that uses machine learning to predict whether recognizer detections are true or false positives and can be applied to any recognizer type, ecological application, or analytical approach. validation prediction uses a predictable relationship between recognizer ... | 2020 | 32335994 |
| partners coordinate territorial defense against simulated intruders in a duetting ovenbird. | duets in breeding pairs may reflect a situation of conflict, whereby an individual answers its partner's song as a form of unilateral acoustic mate guarding or, alternatively, it may reflect cooperation, when individuals share in territory defense or safeguard the partnership. the degree of coordination between the sexes when responding to solo versus paired intruders may elucidate the function of songs in duets. we examined this issue in a study with rufous horneros (furnarius rufus), a duettin ... | 2020 | 31988718 |
| not one hormone or another: aggression differentially affects progesterone and testosterone in a south american ovenbird. | behaviors such as territorial interactions among individuals can modulate vertebrate physiology and vice versa. testosterone has been pointed out as a key hormone that can be rapidly affected by aggressive interactions. however, experimental evidence for such a link is mixed. in addition, behaviors can elicit changes in multiple hormones, which in turn have the potential to synergistically feedback to behavior. for example testosterone and progesterone can act interdependently in modulating male ... | 2018 | 30099004 |
| insight into the species diversity of the quill mite genus betasyringophiloidus skoracki, 2011 (prostigmata: syringophilidae) on the basis of the dna barcodes. | betasyringophiloidus skoracki, 2011 is a genus of quill mites (prostigmata: syringophilidae) that is believed to contain mono-, steno- and polyxenous parasites associated with a wide range of passerine birds (passeriformes) across the world. in this work we applied the dna-barcode marker (mitochondrial cytochrome c oxidase subunit i gene fragment, coi) to verify whether betasyringophiloidus schoeniclus (skoracki, 2002) and betasyringophiloidus seiuri (clark, 1964) are actual steno- and polyxenou ... | 2019 | 31366736 |
| an individual-based model for the dispersal of ixodes scapularis by ovenbirds and wood thrushes during fall migration. | ixodes scapularis is responsible for the transmission of a variety of pathogens in north america, including borrelia burgdorferi sensu stricto, anaplasma phagocytophilum and babesia microti. songbirds have previously been described as agents of tick dispersal, and a combination of empirical data and modeling efforts have implicated songbirds in the range expansion of i. scapularis northward into canada during spring bird migration. the role of fall bird migration has received comparatively less ... | 2019 | 31186200 |
| physiological indicators of habitat quality for a migratory songbird breeding in a forest invaded by non-native japanese barberry (berberis thunbergii). | non-native, invasive plants can impact birds by altering food sources, nesting substrates and other critical resources. japanese barberry (berberis thunbergii) is one of the most invasive, non-native woody plants in in the northeastern usa, and yet almost nothing is known about its effects on birds or other wildlife. to investigate individual-level impacts of japanese barberry on a forest-breeding bird, we compared food abundance (leaf-litter arthropod biomass) and the physiological condition of ... | 2020 | 32391153 |
| the distribution of quill mites (betasyringophiloidus seiuri) among flight feathers of the ovenbird (seiurus aurocapilla). | quill mites of the family syringophilidae (acariformes: prostigmata) are permanent ectoparasites that live inside the hollow quills of feathers and use their long chelicerae to pierce the quill wall to feed on living tissue of the quill follicle. ovenbirds (parulidae: seiurus aurocapilla (linnaeus)) are host to the quill mite betasyringophiloidus seiuri (clark), which has been previously reported to infest only 5.1% of this host's tail feathers; however, this species has also been reported to in ... | 2020 | 31999217 |
| ecological drivers of song evolution in birds: disentangling the effects of habitat and morphology. | environmental differences influence the evolutionary divergence of mating signals through selection acting either directly on signal transmission ("sensory drive") or because morphological adaptation to different foraging niches causes divergence in "magic traits" associated with signal production, thus indirectly driving signal evolution. sensory drive and magic traits both contribute to variation in signal structure, yet we have limited understanding of the relative role of these direct and in ... | 2018 | 29435262 |
| habitat-specific effects of food abundance on the condition of ovenbirds wintering in jamaica. | 1. food availability has been considered one of the most important factors limiting bird populations, yet the effects of food abundance on non-breeding insectivores has rarely been investigated. we studied the effects of food abundance on the body condition of ovenbirds (seiurus aurocapillus l.), a sexually monomorphic, ground-foraging, neotropical-nearctic migrant warbler during two winters in three habitats on their wintering grounds in jamaica. 2. prey biomass decreased from early to late win ... | 2000 | 29313995 |