The Yellow Warbler (*Setophaga petechia*) is one of North America's most widespread and beloved songbirds, a small, bright bundle of energy that lives up to its name with a plumage so thoroughly golden-yellow it seems almost to glow in sunlight. The breeding male is particularly vivid, with a rich canary-yellow body, a slightly olive-tinged back, and — its most distinctive feature — fine reddish-brown streaks running down the breast and flanks, giving it a warm, delicately patterned appearance. The female is similarly yellow but paler and more subdued, with little to no streaking. The Yellow Warbler has large, dark eyes that stand out prominently against its bright face, lending it an alert, almost jewel-like quality. It favors shrubby, wet habitats such as willow thickets, stream edges, and forest margins, and is a familiar summer presence across much of the continent before migrating to Central and South America for the winter. Known for its cheerful, buzzy song — often described as a bright, rolling *"sweet-sweet-sweet, I'm so sweet"* — the Yellow Warbler is also notable for its clever response to brood parasitism by cowbirds: rather than raising an impostor's egg, it will sometimes build a new nest floor directly over the parasitized clutch, occasionally stacking several layers in the process.