If you're strolling along one day and hear what sounds like a squeaky wheel in a tree, you may have stumbled across a Black-and-white Warbler. Their song sounds like "we-see" over and over, like a wheel that could use some oil ( have a listen !). [1, 2] But their sound is only one of many ways they are unique. The Black-and-white Warbler differs from other warblers in many ways. First is how it looks for food. Other warblers like to fly as they hunt, but Black-and-white Warblers prefer to creep along the branches. [3] Their bill is also longer and more curved than other warblers, great for grabbing insects hiding within crevasses. [ 4 ] They also have a unique migratory schedule. Starting in late March, earlier than many other warblers, they'll migrate by night up to their breeding ranges in the eastern U.S. and southern Canada. [1,5, 6 ] Their wintering range is generally from Florida on southward. [4,6] When I saw this bird, it was doing what it was known for:...