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What kind of bird is this?


mmeyer

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I went for a little walk this afternoon and came across this guy buy a little water hole. They're not the greatest pics cuz I had to crop quite a bit. Is this a Gold Finch?

20080413_5138copy_1.jpg

20080413_5139copy_1.jpg

Thanks for any help

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Within bird taxonomy there are "lumpers" and "splitters."

In this case the lumpers won. The myrtle and Audubon's warblers, formerly considered two species, are now lumped together into one species called the yellow-rumped.

However, myrtle and Audubon's are still considered distinct populations of the yellow-rumped. So instead of two distinct species, it's now one species with two separate populations. The myrtle is found all over the U.S. and most of Canada, while the Audubdon's is primarily a western race with occasional sightings in the east. They also interbreed where they both occur, making IDing each population out west even more complicated.

MM's is an adult male yellow-rumped (myrtle type).

In adult males in breeding plumage, the differences in populatioins are easy to spot. Audubon's has a white wing patch and a yellow throat, while the myrtle has white wing bars instead of a patch, and a white throat. The fact that MM's fella has a yellow cap on its head (visible in the second shot) makes it a male, and the white throat (visible in the first shot) makes it a myrtle population.

As another example of lumping, our now dark-eyed junco used to be made up of two species, the Oregon junco and the slate-colored junco. Now they are collapsed into the dark-eyed junco with six distinct populations, including Oregon, pink-sided, white-winged and slate-colored, to name some.

It's all too dang complicated, if you ask me, and can take away from the fun of just liking and watching birds.

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