Astro-raptor

Astro-Raptors are birds from space, that invade worlds and eat everything in sight. They once invaded Earth in egg disguises in Easter, as Easter Eggs, because they landed at an egg hunt.

The Eleventh Doctor once landed at an egg hunt, hoping to find eggs, but everything was empty. He found one of the ships, which wasn't a chocolate egg, and the Astro-Raptors attacked. He was then saved by Pippa. The Doctor used their love for easter eggs to lead the Astro-Raptors into the TARDIS, which he took them to an Alien World (The Egg Hunt), where they could eat floating rocks. (TV: The Egg Hunt)