Who Ate These Butterflies?
Close inspection of a dead butterfly gives a clue as to its predator:



Black-headed Grosbeak
The monarch's abdomen is entirely missing.


Black-backed Oriole
The monarch's abdomen is present, but it appears to be "unzipped" (slit open) and the thorax is gorged.


Black-eared Mouse
Caches of butterflies are found on the ground, and only the wings remain.
Photos of predators copyright Dr. Lincoln P. Brower, Sweet Briar College