This is a Yellow Warbler nest, complete with an exterior of plant down and gull feathers. Yellow Warbler nest. This nest was the first I found, but it turned out to be a little too conspicuous. Crows eventually got to it after the female had laid two eggs and I had to refind her new nest, which she started building immediately after depredation.
Also, happy Father’s Day to my Dad! I guess his nest is empty now, too, but fortunately not through the actions of crows.