Saturday, December 7, 2013

Return to Aurora Reservoir

December 6, 2013

Richard Stevens:

I went by Aurora Reservoir to see what gulls might be lingering around (also to visit a friend who lives along the southern border).  Roads were quite slippery today.  Temperatures in the single digits (sun melts top of snow and cold temps freeze it into ice).

Many gulls stood along the southwestern shore.  These included a Mew Gull (Moore, 11/3), two Lesser Black-backed Gulls (Mlodinow, 11/24), two Thayer's Gulls (Mlodinow, 11/22) and the possible Glaucous-winged Gull (Mlodinow, 11/24). 

Note: the Colorado Bird Records Board does not recognize any pure Glaucous-winged Gulls in Colorado (the Colorado Bird Records Committee does).  There are too many hybrids of Glaucous-winged Gulls with their large Gull brothers and no way without DNA studies to prove Glaucous-winged Gulls have flown into Colorado.

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