A parti-colored warbler within a few feet of me.

May 12. 

Dug up to-day the red-brown dor-bugs. 

My red oak acorns have sent down long radicles underground. 

A parti-colored warbler hangs dead downward like a goldfinch on our gooseberries, within a few feet of me, apparently about the blossoms.

Sylvia Americana [or "parti-colored warbler,”]:
J J. Audubon's blue yellow-backed warbler,
now Northern Parula warbler (Setophaga americana )

H. D. Thoreau, Journal, May 12, 1859

Dug up to-day the red-brown dor-bugs. See April 27, 1857 (“I dig up those reddish-brown dor-bugs in the garden. They stir a little.”)

A parti-colored warbler within a few feet of me. See May 12, 1857 (“ Hear the screep of the parti-colored warbler ”)  See also May 4, 1858 (“Heard the tweezer note, or screeper note, of the particolored warbler, bluish above, yellow or orange throat and breast, white vent, and white on wings, neck above yellowish, going restlessly over the trees. ”); May  9, 1853 ("  Saw on Mr. Emerson's firs several parti-colored warblers or finch creepers (Sylvia Americana) a small blue and yellow bird somewhat like but smaller than the indigo-bird; quite tame about the buds of the firs now showing red; often head downward."); May 9, 1858 (“The parti-colored warbler . . .— my tweezer-bird, – making the screep screep screep note. It is an almost incessant singer . . . utters its humble notes, like ah twze twze twze, or ah twze twze twze twze.”); and A Book of Seasons,  by Henry Thoreau, the parti-colored warbler (Sylvia Americana)