Phylogenetic trees are fractal in the sense that the same ... and turtles, but not birds. Because "reptiles" (in this sense) does not refer to a monophyletic group, it is difficult to make general ...

Instead, today crocodiles are birds' closest living relatives, even though they sit far apart on the phylogenetic tree. To ...

The broken-wing display, in which birds fake being wounded to protect their nests from predators, is found across the avian phylogenetic tree, a study finds. Now that it had an audience, the killdeer ...