Giant magpie

From Ardrana

Giant magpies are similar to their mundane cousins in most ways, but measure 3 to 5 feet from beak to tail. The body and tail are mostly black (often shot with metallic blue, green and lavender), and the shoulders and belly are white. They are notorious for stealing bright objects.

Note: Giant magpies originally appeared in this form in the Mystara Monstrous Compendium Appendix for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.