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- Davis, Andrew K., et al. Show all 2 Author
- Annals of the Entomological Society of America 2015 v.108 no.5 pp. 664-669
- Asclepias; Danaus plexippus; adults; breeding; databases; overwintering; people; regression analysis; spring; Canada; Mexico; United States
- ... Declines in overwintering colonies of monarch butterflies (Danaus plexxipus) in Mexico raise questions about other life cycle phases, such as spring migration, where monarchs recolonize their breeding range in the United States and Canada with sequential generations. We used data from a long-term citizen science program, “Journey North” (now with 18 yr), to identify possible changes to the recolon ...