Edinburgh Zoo's gentoo penguins have been given painted pebbles to celebrate the start of their breeding season in early March. The pebbles act as the birds' versions of love tokens or engagement ...

A male penguin searches an entire beach for the "perfect pebble" to lay at the feet of his chosen female penguin. Female penguins don't rely on pebble presentation as a key aspect of mate selection;, ...

The penguins at Edinburgh Zoo have been gifted painted pebbles to celebrate the start of the breeding season. The zoo's gentoo penguins have been snapped with the gifts as they start building nests in ...

Adélie penguins may look like a bunch of bumbling cartoon characters, but they live under rules stricter than a gated community with too much free time and a neighborhood watch on steroids. There’s no ...