Wing Color of Monarch Butterflies (Danaus plexippus) in Eastern North America across Life Stages: Migrants Are “Redder” than Breeding and Overwintering Stages
Forewings of selected migrant, breeding, and overwintering monarch
butterflies. Note the difference in orange color between migrants and all others.
All wings were scanned with the same scanner using the same settings. Males (M)
and females (F) are indicated.