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Slaty-backed Gull - Larus schistisagus

3 Records

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 Acc. No.YearLocationCountyObservers
2000-1642000 Horseshoe Lake Larimer David Leatherman, Larry Semo, Rachel Hopper, Joe Mammoser, Larry Norris, Ric Olson, Tony Leukering
2014-0082014 Aurora Reservoir ArapahoeDavid Dowell, Kris Petersen, Steven Mlodinow
2022-0382022 Boyd Lake State Park LarimerJosh Bruening, Adrian Lakin, Sue Riffe