[cobirds] Cassia Crossbills continue at Rock Creek Trail

Our DFO field trip was successful in enjoying the Cassia Crossbills at Rock Creek Trail, and even more Type 2 Red Crossbills. We didn't have other types of Red, or White-winged, either. In our experience today the crossbills were active and calling a lot until 9:30 am, and were much less evident after that. Today was sunny and pleasant. I'm glad we were at the trail by 7:40 am.

I include a recording that has both Type 2 Red Crossbill and Cassia Crossbills. The latter begin calling at 36 sec. into the recording when a small group flew in, their lower 'chut' calls mingling with sharper 'kip' of the Reds.. And a pic of one of our Cassia's by participant Ginny Bergstrom.

We encountered about 20 Cassia at 0.3-0.4 mile up the Rock Creek Trail, and then we had at least 9 more Cassia as singles or small groups from 0.5-0.8 mile. They responded well to my Nor. Pygmy-Owl imitation, and that seemed to draw in the first group we had. I think we also had Cassia at the main trailhead parking lot, and further down at two places as we drove up, but we were unable to document these. Type 2 Reds were more numerous for us on the Rock Creek Trail, with at least 46 noted. There were numerous juveniles of both species, esp. among the Type 2 Reds. 

David Suddjian

Ken Caryl Valley

Littleton, CO

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