Date: 3/4/26 4:13 pm From: William Flack via groups.io <sparvophile...> Subject: Re: [NEBirds] Snow/Ross's isn't on eBird
Thanks, Ross! 2% is consistent with the one attempt I made to figure the percentage: a medium-sized flock on Cochran Lake in Scotts Bluff County, where I went through carefully looking at bills. I figured that of the birds whose bills I could see well enough to identify species, about 1 in 40 were Ross's.
However, I have to attach a caution to that. I was assuming that I was seeing a random sampling of the flock. If head-tucking behavior varies between the species, I might've undercounted the tuck-ier species. And if Ross's tend to stick together, rather than dispersing randomly among the Snows, then my sample might've been biased.
