Opening the identification guide
One black line across the hindwing usually separates these two orange butterflies.
Scope: North America; adult monarch versus viceroy, with wear, viewing angle, and regional abundance limiting certainty · Last updated
Source-checked editorial guide. Last updated .
Banded white, yellow, and black, with long black filaments at both ends
Mottled brown, white, and green, humped and bristly, resembling a bird dropping
