See, it was the mere presence of the sock feeder. He (I think this was an immature male, but I’ll defer to the experts on that point) didn’t actually land on the sock that I saw, but the sock was added yesterday, and I was able to add Lesser Goldfinch to my list today, and that’s good enough for me.
This was the best shot I got, and I only kept one because I’m on another 10-species-in-10-photos quest:
noho_bird_club got some nice ones, including this one: