Gary,
Could be warbling vireo. The dark cap and bright eyebrow also make me think about red eyed vireo (we saw one singing vigorously at Castlewood earlier this month).
Cheryl Teuton
Mountain Plover - 8:00 a.m. - 2:00 p.m. Join the "Nunn Guy" on a trip to Pawnee National Grasslands. We'll check my favorite haunts in search of early Mountain Plover, Burrowing Owl, longspurs, and whatever else might be around for spring. Meet 8:...
Gary,
Thanks for a fun day of great birding in some strange Colorado weather! What a treat to see Mountain plovers, Barn owls, McCown's longspurs and the Night Heron rookery. Hope to see you on another trip soon,
Cheryl Teuton and Dan Brooke