Undisputed examples come from the Hawaiian Islands, where extinctions of endemic forest birds are attributed to avian pox and avian malaria transmitted from introduced species [1], [3].
Nevertheless, should the increase we observe for category-trained birds be attributed to the presence of a face in the stimuli, this does not deter from our novel finding of an increase that is specific to only those bird types for which category boundaries were formed during training.
Eight of the complete HA and NA genetic sequences are attributed to wild birds, 3 are attributed to domestic birds, and 1 is attributed to a bird that could not be identified as wild or domestic because insufficient information was available.
The birds' rapid decline is attributed to intensive farming, urbanisation, encroachment on habitats, and failure to sustain fragile populations.
The lasting enmity between the birds, particularly Garuda, and the serpents is attributed to this.
A turkey cock painted about 1612 (Victoria and Albert Museum, London) is attributed to Manṣūr and marks that bird's first appearance in India.
The authors dismiss the possibility that the poor learning in AIV lesioned birds could have occurred because lesions reduced the amount of singing by juvenile birds during the learning period: "Importantly, the impaired vocal imitation in AIV-lesioned birds cannot be attributed to the amount of vocal practice.
Mr Stancliffe says the variation in population trends seen by the five birds can be attributed to the condition of their individual habitats, with the two waterbirds benefitting from better protection of wetlands.
In conclusion, birds of a large range of common species showed reduced brain size as reflected by head volume in heavily contaminated areas around Chernobyl, consistent with the hypothesis that radioactive contamination has significant negative effects on normal brain development, and that such effects in birds cannot be attributed to post-traumatic stress as done for humans.
The severe status of these birds may be attributed to a slower response by these defense mechanisms.
