American Warbler have 35 subspecies. The three I found pictures of are the yellow warble, the mangrove warbler and the Kirtlands warbler. They do look somewhat alike and you can be forgiven for mixing them up. The yellow warbler is also called the golden warbler.
The warbler is about 4 to 7 inches long. The wingspan is 6.3 to 8.7 and I bet birdie didn’t like it when they measured that. They weigh in at 0.25 to 0.53. They would be blown in the direction of a strong wind. If you see one in the air going sideways, that’s the wind.
I’ll use WC for the pictures from Wikimedia Commons.
Th yellow areas are where the warblers breed (that means they lay eggs and hatch little warblers). The green areas is where they breed and spend the winters. The blue areas are where they spend winters.
By, Cephas, WC.
By, Mdf, WC.