We examined the prevalence of antibodies to three mosquito-borne arboviruses in blue jays, Cyanocitta cristata, and Florida scrub-jays, Aphelocoma coerulescens, to identify the effects on host survival, the influence of sex and age on infection, and the temporal patterns of antibody prevalence. Blood samples from 306 blue jays and 219 Florida scrub-jays were collected at Archbold Biological Sta...

A general correlation exists between brain weight and higher cognitive ability in birds and mammals. In birds this relationship is especially evident in corvids. These animals are well-known for their flexible behavior and problem-solving abilities, and have relatively large brains associated with a pallial enlargement. At the behavioral level, New Caledonian crows stand out amongst corvids bec...

The paper considers issues of interaction between aviation and avifauna, relevant in terms flight safety habitats for birds living the impact area ​​ airports. A number parameters aircraft air traffic flow significantly affect behavior diversity respective areas. analysis showed that species composition avifauna at airports includes very few fully synanthropic species, while semi-synanthropes, ...

The article provides an overview of bird remains assigned to the genus Pyrrhocorax Tunstall, 1771 from nine cave sites Late Pleistocene and Early Holocene age within Crimean Peninsula (Ukraine). A large sample chough bones Emine-Bair-Khosar Cave (722 bones) is processed results obtained are presented here for first time. Re-identification revealed presence Alpine graculus in studied region inst...

Carrion is an ubiquitous resource that drives the dynamics of scavenger populations and shapes structure composition their communities. Corvids (Family: Corvidae) are among most common scavengers globally, facilitating carcass discovery by other species contributing to biomass removal. Here, we examine how environmental factors influence corvid scavenging in arid region Central Australia. Speci...

A key characteristic of MHC genes is the persistence of allelic lineages over macroevolutionary periods, often through multiple speciation events. This phenomenon, known as trans-species polymorphism (TSP), is well documented in several major taxonomic groups, but has less frequently been observed in birds. The order Passeriformes is arguably the most successful terrestrial vertebrate order in ...

West Nile virus (WNV)-associated disease has a range of clinical manifestations among avian taxa, the reasons for which are not known. Species susceptibility varies within the avian family Corvidae, with estimated mortality rates ranging from 50 to 100%. We examined and compared virologic, immunologic, pathologic, and clinical responses in 2 corvid species, the American crow (Corvus brachyrhync...

Regional variation in clade richness can be vast, reflecting differences in the dynamics of historical dispersal and diversification among lineages. Although it has been proposed that dispersal into new biogeographic regions may facilitate diversification, to date there has been limited assessment of the importance of this process in the generation, and maintenance, of broad-scale biodiversity ...