Are all yellow-rumped warblers Yellow-rumped Warblers?

So many yellow-rumped warblers!

A Yellow-rumped Warbler (Myrtle, the common subspecies
in Eastern North America), colloquially called "butterbutts" 

Yes, Yellow-rumped Warblers are abundant migrants during spring migration where I live. However, the "butterbutts," as many call Yellow-rumped Warblers, are not alone in being yellow-rumped.

Butterbutt? Nope, but it does have a yellow rump... read on.

Marvelous May Migrants at NYBG

Prairie Warbler, NYBG, 5/3/2018

It's spring migration! I get to see birds that I have not seen since 2017 and hear their songs, many of which I have not heard live since spring 2017. I have been looking and listening mainly at New York Botanical Garden (NYBG), especially in its forest along the Bronx River. Spring migration won't last long, however, and in just a few weeks, I probably will not see these birds again until at least August. Enjoy them while they are here!