Animal lovers who see a bird's egg lying on the ground may be tempted to spring into action to help. Before you scoop up that ...

"It's hard not to feel like a proud parent seeing them out there thriving and making history," London Zoo bird keeper Charlotte James said Jonny Shepherd/TNC-ZSL; TNC-ZSL The once-extinct Sihek bird ...

A laughing kookaburra at Raven Street Reserve in McDowall, Queensland, Australia. The sex-reversed birds were all classified in three ways: genetic males that have a complete feminine phenotype (i.e.