This video from the USA says about itself:
18 July 2011
But is the myrtle warbler in this video really a yellow-rumped warbler?
From the Cornell Lab of Ornithology in the USA, September 2016:
Familiar Songbird May Be At Least Three Different Species
Affectionately known to bird watchers as “butterbutts,” Yellow-rumped Warblers are at the center of another discussion over what defines a species. In 1973, the Myrtle and Audubon’s warbler species were lumped into one to create the yellow-rumped. But ornithologists may have had it right the first time. Read about what the DNA evidence suggests.