Animals that are higher up the food chain, such as penguins, are especially vulnerable to changes in the environment.

Longer summers are allowing more king penguin chicks to bulk up and survive the winter, but the penguins' main fishing area is shifting further away as temperatures rise ...

The birds are breeding earlier, and more of their chicks are surviving. But researchers fear this success may not last ...

The Pueblo Zoo announced on Facebook the birth of a critically endangered African penguin chick, marking the first such arrival at the zoo in more than ...