Yellow-rumped Warbler Identification

This past weekend it was gorgeous in New England. We had temperatures in the 90s in Bridgewater and I took advantage, doing yard work and going birding on Sunday. I've help out hope for the diversity of birds in the Stiles & Hart conservation area behind our house, and sure enough I saw warblers! And here I thought I had to travel all the way to Boston-area parks in order to see migratory warblers...

I picked up on their call and found a group of 3 or so among saplings and low bushes. The area small trees covered an area passing over a creek connecting two of the ponds in Stiles & Hart. I stopped and watched them for probably a half hour and even saw a Northern Waterthrush walking along and pecking at the edges of the creek but unfortunately didn't get a picture.

It was very difficult photographing them between the emerging leaves, but here are some of the best pictures. I will also point out some tips for male yellow-rumped warbler identification.

First, I notice the black inverted "V" on its breast:

Then I look for the tell-tale "yellow rump" and yellow mark on its crown:

Next I look for the yellow markings on the sides of its breast:

Here are some other great pictures I think help give different perspectives of the bird: