Greetings All,
Steve Ritt reported a Thayer's Gull like bird from Windsor Res, hanging out with a bunch of Ring-billed Gulls. My impression is that the Thayer's like (vs Herring Gull) qualities were mostly due to restricted black in the primaries. If, and if is an important word here, that is true, and if the bird was not clearly larger than the RB Gulls, I would like to suggest that the bird was a RB Gull that was molting its primaries. Some adult Ring-billed Gulls around this time of year (really from Aug into Nov) have VERY limited black on the wingtips, and I've been might confused by some throughout the years wondering if they might be anything from a BL Kittiwake to (yes) a Thayer's Gull to (recently, and with others who thought the same) Bonaparte's Gull. So, a possibility to consider. Also, I'd like to point out that GT Grackles bred at Jim Hamm Pond this year, and I believe (maybe incorrectly) that they've done so for some time... and Jim Hamm Pond is, barely, within Boulder County: or was this the first year? Cheers Steven Mlodinow -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/cobirds?hl=en.
