Observation notes: Very late season flight. Sunny morning, not yet 50°F, after at least two 20°F nights. Site adjacent to Lake Champlain. The most recent previous observations of Colias eurytheme and philodice were on 14 & 16-November; first deep freeze was on 18-Nov.
Verified by: Kent McFarland
Verified date: December 24, 2011
Coordinator notes: characteristics of both species suggests this is of hybrid origins