资讯

The elegant and intelligent birds in the Corvus genus have finally been getting the appreciation they deserve lately, with recent studies not just shedding light on crow and raven tool usage but ...
It is the voice, not of a crow, but of the Australian raven. And they are not the same. Australia has five native corvids, according to Birdlife Australia's Sean Dooley. Three are ravens ...
Though similar in appearance to the American crow, the common raven (Corvus corax) is distinguished by its large size ... But for birds who are still learning the art of foraging in winter — and who ...