Female Common or Barrow's Goldeneye

[Julie Martinez]

Hi CO Birders!

It has been awhile since I've been on here, recently having moved to Aurora. I wanted to get your input on a female Goldeneye. I've been seeing more and more Common Goldeneyes lately, even a Hooded Merganser (first for me) and a lone Pied-billed Grebe that snuck in, nearby at a small pond, but wanted to get your input. Any field ID tips to further distinguish between a female Common and Barrow's would be helpful. I've circled the female in question. I've referenced many images and articles, and my gut says Common, but she looks different than the surrounding females. Is she younger?

Thank you!

Julie M.

Aurora, CO.