A Michigan animal sanctuary owner alleged state authorities were inhumane when they culled her birds. She changed the state's H5N1 depopulation code.

The male has a grey head and black bib, the size of which displays ... and caterpillars in the summer. Male birds are black with the iconic bright yellow beak. Female birds are much lighter ...

Two of the primary culprits for their decline were the pesticide DDT, causing eggshell thinning in birds that ... is their beak -- the bald eagle has a very large, bright yellow beak, while the golden ...

Two components that are considered culprits for the decline were the pesticide DDT that caused eggshell thinning in birds ... black, unlike the bald eagle which has a larger, bright yellow beak.

Two of the primary culprits for their decline were the pesticide DDT, causing eggshell thinning in birds that ... bright yellow beak, while the golden eagle’s is small and black.

They exhibit sexual dimorphism in size, with males being approximately twice ... They can weigh 5 to 9kg, and the birds are known for their distinctive yellow beaks. Clearly, there are many reasons to ...

The Java sparrow is ready for the video recording. As I hold it carefully in my hand in order to transfer it to the recording ...

But interestingly, even birds of the same species show small differences in their song based on much subtler differences in beak size. And such variations within species are essential if we want ...