Erect-crested penguins commonly perform a practice that's rare in birds: They lay an egg only to reject it, to ensure the survival of a second, bigger egg. Researchers finally cracked the case of this odd behavior.
In 'bizarre behavior,' New Zealand penguins lay one egg, reject it, and then lay another. Now, scientists know why. : Read more
In 'bizarre behavior,' New Zealand penguins lay one egg, reject it, and then lay another. Now, scientists know why. : Read more