infection by bunyamwera virus (orthobunyavirus) in free ranging birds of cordoba city (argentina).infection by bunyamwera virus (bunv) species (family bunyaviridae, genus orthobunyavirus) has been detected in ewes, goats, cows, horses and humans all the way through america. however, there are no evidences of such infection in birds. to detect bunv (cbaar-426) infection in free ranging birds, a serological survey was carried out in córdoba city between 2004 and 2005. birds of 13 families presented neutralizing antibodies against bunv (cbaar-426), showing an increase in the seroprevalence from ...200919501478
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 ...201830099004
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 ...202031988718
bird nest orientation and local temperature: an analysis over three decades. 202032145063
female and male rufous horneros eject shiny cowbird eggs using a mental template of the size of their own eggs.hosts of interspecific brood parasites often evolve antiparasitic defences, like the recognition and rejection of parasite's eggs. most hosts use differences in coloration and maculation to discriminate between their own and parasitic eggs, but there are a few cases of hosts using the size of eggs as a cue. to recognize parasite eggs, hosts may require the presence of their own eggs and use a discordancy rule or may use a mental template of their own eggs. females are responsible for egg rejecti ...202032473280
new species and additional data on the chewing louse genus myrsidea (phthiraptera: menoponidae) from wild neotropical passeriformes (aves).twenty-four species of chewing lice of the genus myrsidea waterston, 1915 (phthiraptera: menoponidae) from neotropical suboscines (passeriformes: formicariidae, furnariidae, pipridae, thamnophilidae, tityridae, tyrannidae) are recorded and discussed. they include: eight new species which are described and illustrated (myrsidea capeki new species ex chiroxiphia caudata; myrsidea leptopogoni new species ex leptopogon superciliaris; myrsidea leucophthalmi new species ex automolus leucophthalmus; my ...201830313568
small intestinal epithelial permeability to water-soluble nutrients higher in passerine birds than in the small intestine transcellular and paracellular pathways are implicated in water-soluble nutrient absorption. in small birds the paracellular pathway is quantitatively important while transcellular pathway is much more important in terrestrial mammals. however, there is not a clear understanding of the mechanistic underpinnings of the differences among taxa. this study was aimed to test the hypothesis that paracellular permeability in perfused intestinal segments is higher in passerine bir ...201830073711
the rufous hornero (furnarius rufus) nest as an incubation chamber.foraging and incubation are mutually exclusive activities for parent birds. a trade-off is generated when a combination of food availability and temperature regulation force birds to choose one and neglect the other, at least temporarily. the rufous hornero builds large, oven-like, mud nests, the evolutionary cause of which remains unknown. we tested that temperature variation inside the nest is that which is expected if one function of the nest were for temperate regulation. if so, this would s ...201525526648
dermatitis caused by the tropical fowl mite ornithonyssus bursa (berlese) (acari: macronyssidae): a case report in humans.we herein report human dermatitis caused by the tropical fowl mite ornithonyssus bursa (berlese). the cases occurred in an apartment in a residential district of porto alegre city, state of rio grande do sul, brazil, where three members of the same family presented with pruritic lesions on the arms and legs. on inspecting the bathroom, several mites measuring approximately 1.0mm in length were observed coming from a nest of rufous hornero, furnarius rufus (gmelin). this is the first report of o. ...201526676510
the family cavognathidae (coleoptera: cucujoidea) in argentina and adjacent countries.the family cavognathidae (coleoptera: cucujoidea) in argentina is represented by three species of the genus taphropiestes reitter, 1875: t. fusca reitter, 1875 [chubut], t. magna ślipiński & tomaszewska, 2010 [río negro; chubut], and t. plaumanni ślipiński & tomaszewska 2010 [buenos aires]. a total of 2565 larvae (multiple instars), 83 pupae, 2028 live adults, and 16 dead adults of t. plaumanni were found in argentina between 2005 and 2013 in the nests of birds representing the families columbid ...201627394368
a rickettsia parkeri-like agent infecting amblyomma calcaratum nymphs from wild birds in mato grosso do sul, total, 142 birds, mostly passerines, belonging to 42 species were examined for the presence of ticks in 3 locations in mato grosso do sul brazil during 2006. seven birds (5%) were infested with 4 nymphs of amblyomma calcaratum (ramphocelus carbo, 3 infested/12 examined) and 5 larvae of amblyomma sp. (furnarius rufus, 2/5; turdus leucomelas, 1/6; and paroaria capitata, 1/8). all 4 nymphs of a. calcaratum tested by polymerase chain reaction targeting rickettsial genes glta and ompa and by ampli ...201323238243
coevolution and avian brood parasitism: cowbird eggs show evolutionary response to host discrimination.the rufous hornero (furnarius rufus) is an important host of the brood parasitic shiny cowbird (molothrus bonariensis) in uruguay, but not in nearby buenos aires province, argentina. eggs of the shiny cowbird are extremely variable in size, and horneros eject cowbird eggs with widths less than about 88% of the widths of their own eggs. uruguayan cowbird eggs are, on average, 12% larger than those from buenos aires, a geographic pattern in egg size that corresponds to the pattern of successful ho ...198628563499
insects found in birds' nests from argentina. pseudoseisura lophotes reichenbach, 1853 and anumbius annumbi (vieillot, 1817) (aves: furnariidae), hosts of triatoma platensis neiva, 1913 (hemiptera: reduviidae: triatominae).the insect fauna of the nests of pseudoseisura lophotes (reichenbach, 1853) (aves: furnariidae) from argentina was investigated. a total of 110 species (68 identified to species, 22 identified to genus, 20 identified to family) in 40 families of 10 orders of insects was found in these nests. triatoma platensis neiva, 1913 (hemiptera: reduviidae) was found again in nests of p. lophotes, corroborating after 73 years the first observations made by mazza in 1936. the occurrence of the insects in nes ...201424871037
new family host and records of acanthocrios furnarii (cordero & vogelsang, 1928) (hemiptera: cimicidae) from argentina, and implications in the transmission mechanism of cimicid bugs among birds' nests.acanthocrios furnarii (cordero & vogelsang, 1928) [hemiptera: cimicidae: haematosiphoninae] is an ectoparasite on avian hosts from argentina and uruguay. it has been mostly found in mud nests of furnarius rufus (gmelin, 1788) [aves: furnariidae], but its true hosts are some of the inquiline birds that use f. rufus nests. these inquiline hosts belong to the families emberizidae, hirundinidae, icteridae, passeridae, and troglodytidae. outside f. rufus mud nests, a. furnarii has been found in nests ...201326131534
simple neural substrate predicts complex rhythmic structure in duetting birds.horneros (furnarius rufus) are south american birds well known for their oven-looking nests and their ability to sing in couples. previous work has analyzed the rhythmic organization of the duets, unveiling a mathematical structure behind the songs. in this work we analyze in detail an extended database of duets. the rhythms of the songs are compatible with the dynamics presented by a wide class of dynamical systems: forced excitable systems. compatible with this nonlinear rule, we build a biolo ...200516241480
highly structured duets in the song of the south american hornero.the south american hornero (furnarius rufus) is a suboscine bird widely known for its mud-made, oven-looking nest. beyond their architectural skills, the male and female horneros sing in highly structured duets. the analysis of field recordings reported in this work reveals that as the male increases the note production rate the female responds by switching to different locking states: the ones predicted by the theory of nonlinear forced oscillators. this gives the duet a most appealing rhythm, ...200314754163
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