The Yellow-rumped Warbler is the little sparkplug of the woods, flaunting a sunny yellow “butter butt” that’s impossible to miss as it flits through trees. It's a tough cookie too—one of the few warblers that sticks around in colder months, thanks to its quirky ability to digest waxy berries. Energetic and adaptable, it’s the go-anywhere, eat-anything explorer of the bird world!