Scaup in Help Me Identify a North American Bird Posted February 2, 2020 1 hour ago, Tony Leukering said: This is an immature, so head shape is suspect. However, I'd go with Lesser. I assume that it was actively diving, yes? Yes, it was diving actively. I got these shots about a minute apart during a short (about five minute) break it took from diving, when it was meandering across the pond to rejoin the Lesser Scaup flock; but except for that, it spent most of its time under water. I was in the rain half an hour trying to decide what it was, but really only got that one opportunity to study it for more than a few seconds at a time. I'm actually relieved to know it's actually a legitimately challenging scaup, and not just me!