Warblers are often heard before they are seen. The Black-throated Green Warbler has a very recognizable call that sounds like zee-zee-zee-zoo-zee. I can tell this is a male because of the extensive black on the throat, sides, and chest. It prefers to nest in coniferous forests. Its nesting range includes central and southeastern Canada, northeastern United States, including Minnesota and Wisconsin, and the Appalachian Mountains.