Butterfly lookout

Which butterflies are newly emerging or arriving? Species in the list below have early sighting dates within 10 days of today. Early dates are often indicators of uncommonly warm weather, so the median date of first sighting is also listed.

Butterflies first seen around this week

Species	Earliest sighting	Median first sighting	Seen this year?
Compton Tortoiseshell	Mar 6	Apr 6
Milbert's Tortoiseshell	Mar 11	May 10	–
Eastern Comma	Mar 16	May 16	–
Mourning Cloak	Mar 17	Apr 3	–