| phylogeography, inter-specific limits and diversification of turdus ignobilis (aves: turdidae). | turdus ignobilis is a widely distributed thrush species throughout northern south america and the amazon, inhabiting a diverse set of habitats ranging from floodplain forests, white sand "campinas", to highland forests (andes and tepuis). there are currently six known subspecies of t. ignobilis, which vary extensively phenotypically and also ecologically, but whose interspecific limits and evolutionary history have never been investigated before. in this study, we used molecular data and plumage ... | 2016 | 26797171 |
| avian pox in birds from trinidad. | over a 7-year period in trinidad, 9,514 birds were examined for avian pox and four species were found infected: the golden-headed manakin, pipra erythrocephala (7% infected), the white-bearded manakin, manacus manacus (5%), the violaceous euphonia euphonia violacea (1%), and the bare-eyed thrush, turdus nudigenis (less than 1%). the elaborate courtship displays of manakins may have a bearing on a "common source" type of infection. the apparently abrupt appearance of the disease at three localiti ... | 1982 | 6285009 |
| reduced inflammation in expanding populations of a neotropical bird species. | the loss of regulating agents such as parasites is among the most important changes in biotic interactions experienced by populations established in newly colonized areas. under a relaxed parasite pressure, individuals investing less in costly immune mechanisms might experience a selective advantage and become successful colonizers as they re-allocate resources to other fitness-related traits. accordingly, a refinement of the evolution of increased competitive ability (eica) hypothesis proposed ... | 2016 | 28725417 |