| ecological and evolutionary implications of energy and protein requirements of avian frugivores eating sugary diets. | to assess how the high-sugar/low-protein content of fruit diets affects digestive function and nutrition of frugivorous birds, i compared intake, passage rate, sugar utilization, protein requirements, and mass changes of cedar waxwings (bombycilla cedrorum), american robins (turdus migratorius), and wood thrushes (hylocichla mustelina) fed synthetic diets simulating the range of sugar (6.6%, 12.4%, and 22.0% solutes) and protein (4.5%, 3.0%, and 1.5% of dry matter) content of bird-dispersed frui ... | 1998 | 9798248 |
| adverse effects of acid rain on the distribution of the wood thrush hylocichla mustelina in north america. | research into population declines of north american bird species has mainly focused on the fragmentation of habitat on the breeding or wintering grounds [robinson, s. k., thompson, f. r., donovan, t. m., whitehead, d. r. & faaborg, j. (1995) science 267, 1987-1990]. in contrast, research into declines of european species has mainly focused on intensification of agriculture [donald, p. f., green, r. e. & heath, m. f. (2001) proc. r. soc. london ser. b 268, 25-29] and the role played by the atmosp ... | 2002 | 12177451 |
| spatial heterogeneity in predator activity, nest survivorship, and nest-site selection in two forest thrushes. | the ability of prey to find and use predator-free space has far-reaching consequences for their persistence and interactions with their predators. we tested whether nest survivorship of the ground-nesting veery (catharus fuscescens) and shrub-nesting wood thrush (hylocichla mustelina) was related to the local absence of a major nest predator, the white-footed mouse (peromyscus leucopus). mouse-free space was defined by trap stations that failed to trap a mouse during the avian breeding season (a ... | 2006 | 16425046 |
| modeling spatial variation in avian survival and residency probabilities. | the importance of understanding spatial variation in processes driving animal population dynamics is widely recognized. yet little attention has been paid to spatial modeling of vital rates. here we describe a hierarchical spatial autoregressive model to provide spatially explicit year-specific estimates of apparent survival (phi) and residency (pi) probabilities from capture-recapture data. we apply the model to data collected on a declining bird species, wood thrush (hylocichla mustelina), as ... | 2010 | 20715606 |
| lipid and water depletion in migrating passerines following passage over the gulf of mexico. | lipid depletion is currently believed to be the primary factor limiting flight duration of migrating birds in north america, while the influence of water loss is thought to be small. three migrating species of passerines, wood thrush (hylocichla mustelina), swainson's thrush (catharus ustulatus), and summer tanager (piranga rubra) were captured during the 1993 spring migration just after crossing the gulf of mexico and examined for lipid and water depletion. the redwinged blackbird (agelaius pho ... | 1996 | 28307151 |
| a review of mites of the subfamily picobiinae johnston & kethley, 1973 (prostigmata: syringophilidae) from north american birds. | the fauna of ectoparasitic mites of the subfamily picobiinae (acari: syringophilidae) associated with birds of the north america is revised. a new genus, charadriineopicobia n. g. is proposed for two quill mite species, ch. calidris n. sp. from calidris alba (pallas) (charadriiformes: scolopacidae) and ch. leucophaeus (skoracki, hendricks & spicer, 2010) n. comb. from leucophaeus atricilla linnaeus (charadriiformes: laridae). the new genus differs from the closely related neopicobia skoracki, 20 ... | 2014 | 24395579 |
| 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 |
| 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 |
| an integrated population model for bird monitoring in north america. | integrated population models (ipms) provide a unified framework for simultaneously analyzing data sets of different types to estimate vital rates, population size, and dynamics; assess contributions of demographic parameters to population changes; and assess population viability. strengths of an ipm include the ability to estimate latent parameters and improve the precision of parameter estimates. we present a hierarchical ipm that combines two broad-scale avian monitoring data sets: count data ... | 2017 | 28036137 |
| spatial and temporal drivers of avian population dynamics across the annual cycle. | untangling the spatial and temporal processes that influence population dynamics of migratory species is challenging, because changes in abundance are shaped by variation in vital rates across heterogeneous habitats and throughout the annual cycle. we developed a full-annual-cycle, integrated, population model and used demographic data collected between 2011 and 2014 in southern indiana and belize to estimate stage-specific vital rates of a declining migratory songbird, the wood thrush (hylocich ... | 2017 | 28756623 |
| binational climate change vulnerability assessment of migratory birds in the great lakes basins: tools and impediments. | climate change is a global concern, requiring international strategies to reduce emissions, however, climate change vulnerability assessments are often local in scope with assessment areas restricted to jurisdictional boundaries. in our study we explored tools and impediments to understanding and responding to the effects of climate change on vulnerability of migratory birds from a binational perspective. we apply and assess the utility of a climate change vulnerability index on 3 focal species ... | 2017 | 28225817 |
| effects of breeding versus winter habitat loss and fragmentation on the population dynamics of a migratory songbird. | many migratory species are in decline and understanding these declines is challenging because individuals occupy widely divergent and geographically distant habitats during a single year and therefore populations across the range are interconnected in complex ways. network modeling has been used to show, theoretically, that shifts in migratory connectivity patterns can occur in response to habitat or climate changes and that habitat loss in one region can affect sub-populations in regions that a ... | 2016 | 27209785 |
| quantifying drivers of population dynamics for a migratory bird throughout the annual cycle. | worldwide, migratory species are undergoing rapid declines but understanding the factors driving these declines is hindered by missing information about migratory connectivity and the lack of data to quantify environmental processes across the annual cycle. here, we combined range-wide information about migratory connectivity with global remote-sensing data to quantify the relative importance of breeding and non-breeding environmental processes to persistent long-term population declines of a mi ... | 2016 | 26817774 |
| carry-over effects of nonbreeding habitat on start-to-finish spring migration performance of a songbird. | for migratory animals, conditions during the nonbreeding period may carry-over to influence spring migration performance. animals in low-quality habitats are predicted to be in poorer condition, show later migration timing, and travel at slower speeds. this can result in subsequent negative effects on fitness. we tested the hypothesis that nonbreeding season body condition and habitat quality carry-over to affect spring migration performance of a long-distance migratory songbird, the wood thrush ... | 2015 | 26529241 |
| seasonal change in tropical habitat quality and body condition for a declining migratory songbird. | many migratory songbirds spend their non-breeding season in tropical humid forests, where climate change is predicted to increase the severity and frequency of droughts and decrease rainfall. for conservation of these songbirds, it is critical to understand how resources during the non-breeding season are affected by seasonal patterns of drying, and thereby predict potential long-term effects of climate change. we studied habitat quality for a declining tropical forest-dwelling songbird, the woo ... | 2015 | 26001604 |
| tracking from the tropics reveals behaviour of juvenile songbirds on their first spring migration. | juvenile songbirds on spring migration travel from tropical wintering sites to temperate breeding destinations thousands of kilometres away with no prior experience to guide them. we provide a first glimpse at the migration timing, routes, and stopover behaviour of juvenile wood thrushes (hylocichla mustelina) on their inaugural spring migration by using miniaturized archival geolocators to track them from central america to the u.s. and canada. we found significant differences between the timin ... | 2014 | 25141193 |
| connectivity of wood thrush breeding, wintering, and migration sites based on range-wide tracking. | many migratory animals are experiencing rapid population declines, but migration data with the geographic scope and resolution to quantify the complex network of movements between breeding and nonbreeding regions are often lacking. determining the most frequently used migration routes and nonbreeding regions for a species is critical for understanding population dynamics and making effective conservation decisions. we tracked the migration of individual wood thrushes (hylocichla mustelina) (n = ... | 2015 | 25052795 |
| repeat tracking of individual songbirds reveals consistent migration timing but flexibility in route. | tracking repeat migratory journeys of individual animals is required to assess phenotypic plasticity of individual migration behaviour in space and time. we used light-level geolocators to track the long-distance journeys of migratory songbirds (wood thrush, hylocichla mustelina), and, for the first time, repeat journeys of individuals. we compare between- and within-individual variation in migration to examine flexibility of timing and route in spring and autumn. date of departure from winterin ... | 2012 | 22848395 |
| corticosterone stress response and plasma metabolite levels during breeding and molt in a free-living migratory songbird, the wood thrush (hylocichla mustelina). | many birds face energetic trade-offs between different life history stages, such as reproductive effort, feather molt and the non-breeding period. little is known about how physiological measures of condition (corticosterone, plasma metabolites) in free-living birds change from nesting stages to the post-breeding molt period or whether this is influenced by prior reproductive effort. we evaluated whether corticosterone (cort) and plasma metabolite levels vary with date, nest stage and sex in a f ... | 2011 | 21255575 |
| effects of post-breeding moult and energetic condition on timing of songbird migration into the tropics. | each autumn billions of songbirds migrate between the temperate zone and tropics, but little is known about how events on the breeding grounds affect migration to the tropics. here, we use light level geolocators to track the autumn migration of wood thrushes hylocichla mustelina and test for the first time if late moult and poor physiological condition prior to migration delays arrival on the winter territory. late nesting thrushes postponed feather moult, and birds with less advanced moult in ... | 2011 | 20659932 |
| age-specific reproduction and survival of individually marked wood thrushes, hylocichla mustelina. | several nonexclusive, sometimes contradictory, hypotheses have been employed to explain age-related changes in reproduction and survival among vertebrates. we evaluated these hypotheses with observations collected from a 31-year study of individually marked wood thrushes (hylocichla mustelina). age-specific fledgling production, survival probabilities, and derived life table columns are presented here. additionally, we report "genetic value," or the number of young remaining to be recruited into ... | 2009 | 19294927 |
| tracking long-distance songbird migration by using geolocators. | we mapped migration routes of migratory songbirds to the neotropics by using light-level geolocators mounted on breeding purple martins (progne subis) and wood thrushes (hylocichla mustelina). wood thrushes from the same breeding population occupied winter territories within a narrow east-west band in central america, suggesting high connectivity of breeding and wintering populations. pace of spring migration was rapid (233 to 577 kilometers/day) except for one individual (159 kilometers/day) wh ... | 2009 | 19213909 |
| wood thrush nest success and post-fledging survival across a temporal pulse of small mammal abundance in an oak forest. | 1. synchronized mass production of seed crops, such as acorns, produces a resource pulse that may have far-reaching consequences for songbird populations through its effects on avian predators. seed production in these forests represents only the first of several pulsed events. secondary pulses emerge as mast-consuming rodents numerically respond to seed production and tertiary pulses emerge as generalist predators, such as raptors, numerically respond to rodents. in turn, these two groups reduc ... | 2008 | 18355240 |
| graph theory as a proxy for spatially explicit population models in conservation planning. | spatially explicit population models (sepms) are often considered the best way to predict and manage species distributions in spatially heterogeneous landscapes. however, they are computationally intensive and require extensive knowledge of species' biology and behavior, limiting their application in many cases. an alternative to sepms is graph theory, which has minimal data requirements and efficient algorithms. although only recently introduced to landscape ecology, graph theory is well suited ... | 2007 | 17913139 |
| evidence of large-scale source-sink dynamics and long-distance dispersal among wood thrush populations. | source-sink dynamics are commonly thought to occur among wood thrush (hylocichla mustelina) and other songbird populations, allowing for the persistence of populations with negative growth rates ("sinks") through immigration from populations with positive growth rates ("sources"). knowledge of source-sink dynamics is important for management and conservation because the removal of source habitat should result in the extinction of dependent sinks. however, since research has focused on identifyin ... | 2006 | 17249228 |
| 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 |
| differential post-fledging habitat use of nearctic-neotropical migratory birds within an urbanized landscape. | persistent declines in migratory songbird populations continue to motivate research exploring contributing factors to inform conservation efforts. nearctic-neotropical migratory species' population declines have been linked to habitat loss and reductions in habitat quality due to increasing urbanization in areas used throughout the annual cycle. despite an increase in the number of studies on post-fledging ecology, generally characterized by the period between fledging and dispersal from natal a ... | 2018 | 30151198 |
| a new isosporan (apicomplexa: eimeriidae) from wood thrush, hylocichla mustelina (aves: passeriformes: turdidae), in oklahoma. | the wood thrush, hylocichla mustelina, is a north american passerine bird closely related to other thrushes and is widely distributed across north america. nothing is known of the coccidian parasites of this bird. feces from a single h. mustelina found dead in mccurtain county, oklahoma were collected and examined for coccidia; it was found to be passing a new species of isospora. oocysts of isospora gmelini n. sp. are subspheroidal to ellipsoidal with a smooth bilayered wall, measure (length [l ... | 2020 | 32296848 |
| modeling avian full annual cycle distribution and population trends with citizen science data. | information on species' distributions, abundances, and how they change over time is central to the study of the ecology and conservation of animal populations. this information is challenging to obtain at landscape scales across range-wide extents for two main reasons. first, landscape-scale processes that affect populations vary throughout the year and across species' ranges, requiring high-resolution, year-round data across broad, sometimes hemispheric, spatial extents. second, while citizen s ... | 2020 | 31837058 |
| 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 |
| the shape of density dependence in fragmented landscapes explains an inverse buffer effect in a migratory songbird. | it is well known that forest fragmentation reduces fecundity in several avian species, including wood thrush, hylocichla mustelina, a migratory songbird that has been declining for several decades. however, i found that landscape-scale density in wood thrush was lower and population declines steeper in higher quality, less-fragmented landscapes (an inverse buffer effect) than in poor quality landscapes. these patterns suggest that wood thrush was not limited by availability of breeding habitat b ... | 2017 | 29109473 |