"tit-lark", up in the Rockies, circa 1870s. My assumption: mountain
chickadee (it's a high-elevation woodland bird), any other ideas?

When did we yanks decide to call tits chickadees, anyway?

- Don Baccus, Portland OR <donb at rational.com>
Nature photos, on-line guides, at http://www.xxxpdx.com/~dhogaza