Mice Eat Monarchs
Mice feed at night. They eat butterflies that they find on the ground. The mice will eat living, dying, and recently dead butterflies. There are 4 species of mice in the sanctuary area, but only one species is known to feed heavily on monarchs. For some reason, the Black-eared mouse (Peromyscus melanotis) can eat monarchs without being hurt by the poison. One mouse can eat about 37 monarchs a night. Mice leave a pile of wings on the ground.