Yellow Warblers have returned from Central America with mating on their minds. This male Yellow is singing one of birdom’s most melodious songs: “sweet, sweet, sweet, I’m so sweet,” trilled repeatedly up and down the scale.

He’s hoping to attract a blonde beauty with which he’ll likely be monogamous, at least for the summer. When she comes along, she’ll be identical, except she’ll have very light chestnut-colored stripes on the breast or none at all.

One of the collective names for this species is, aptly, “a sweetness of Yellow Warblers.” (Brooklin, Maine)