(Just nine? So what’s all this Confusing Fall Warbler fuss about?!) But among these, I would say there are really only nine difficult identification groups, which are briefly discussed below. Not including the rarities and local species, there are perhaps 25 warbler species an active birder could potentially encounter in Minnesota in fall. ![]() In sum, just be prepared for encountering three general plumage types this fall: adult males (almost all of which are relatively easy to identify), adult females/immature males (which are no more difficult than females in spring), and immature females (OK, I admit it, some of these are hard). Since you never hear much about a “Confusing Spring Female Warblers Complex”, these should not be especially daunting. Immature males of most species resemble - and are often almost indistinguishable from - adult females.
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