I have seen numerous Common Goldeneye over the years but never a Barrow’s Goldeneye. During my first year of birding one of my three life chases was for a female Barrow’s Goldeneye. She was hanging with a group of female Common Goldeneye on the Illinois River at Peoria. I easily found the Goldeneyes and spent an hour in the freezing weather but never could turn one of the Common’s into a Barrow.
There had been discussion on the Illinois listserv if one was a Barrow’s or not with the prevailing wisdom the bill was yellow enough for a Barrow’s. I have since seen this argument numerous times as people try to turn a Common into a Barrow’s. Especially in Illinois where a Barrow’s does occasionally turn up in a flock of Common.
Well let me say after spending a couple of minutes at the Silverthorne Sewage Ponds there isn’t an argument on Goldeneye differences.
Colorado County Birding states the Silverthorne Sewage Ponds are a reliable spot to see Barrow’s Goldeneye in the winter. Since it is only two miles off I-70 I thought I’d stop and see for myself if there is a case for arguing about the species.
It was cold, windy, and snowing in the mountains when I stopped. Luckily the ponds are right on the main drag since I wanted to keep moving and get back down to lower altitude.
Immediately upon exiting the car I saw a group of Barrow’s and immediately recognized them. Not even close to the markings on a Common Goldeneye. I know I was close but the difference was easily apparent. The crescent on the male Barrow’s looks nothing like the round spot on the Common. And the all yellow bill of female didn’t hint at the Common’s mostly black bill.
Then off to Grand Junction to start the real trip.