Having three adults in the nest frees up one of the birds “to kind of maintain the social status within the social hierarchy of the flock,” one researcher said.

A pair of critically endangered, nearly 100-year-old Galapagos tortoises at the Philadelphia Zoo have become first-time parents.

In May 1835 in Willamette Falls, Oregon, an eager young Philadelphia naturalist named John Kirk Townsend collected a female California condor. It’s one of the oldest specimens among the ...

From the adorable but deadly pine marten to the massive sperm whale, get to know some of the amazing animals that call ...

As a new animal habitat sprung up at Phoenix Zoo, two California condors watched closely. Then they learned who was moving in.

The California condors kept an eye on the bustle ... Caipora weighs around 116 pounds, on the smaller side for a female jaguar. But when sedated, she gets kind of… floppy. Griffith, Addelson ...

The female seemed skittish at first ... For anyone who considers the California condor an unsightly bird, Asel suggests watching them at sunset. “Their heads and crops can reflect the ...