An olive-sided flycatcher?

May 15

May 15.  P. M. —To Beck Stow’s. 

Suddenly very warm. 

Hear a hummingbird in the garden. Pear blossomed, -- some perhaps yesterday. Locust, black and scarlet oak, and some buttonwoods leaf. 

A yellow butterfly. 

I hear from the top of a pitch pine in the swamp that loud, clear, familiar whistle which I have sometimes wrongly referred to the wood pewee,  whip-ter-phe-ee. Is it the whip-tom-kelly note which Soane and Wilson gave to the red-eye, but which Nuttall says he never heard from it? Some times ter-phee-e. This is repeated at considerable intervals, the bird sitting quite still a long time. I saw it dart out once, catch an insect, and return to its perch muscicapa-like.  As near as I could see it had a white throat, was whitish, streaked with dark, beneath, darker tail and wings, and maybe olivaceous shoulders; bright yellow within bill. Probably M. Cooperi.

Andromeda calyculata begins to leaf -- separate twigs from blossoming ones. Andromeda Polifolia just open.

Buck-bean, apparently in three days (in house the 18th). 

The 13th, saw large water-bugs (Gyrinus) crawled up high on rocks. 

Watch a pine warbler on a pitch pine, slowly and faithfully searching it creeper-like. It encounters a black and white creeper on the same tree; they fly at each other, and the latter leaves, apparently driven off by the first. This warbler shuts its bill each time to produce its peculiar note. 

Rhodora will apparently open in two or three days. 

See and hear for a moment a small warbler-like bird in Nemopanthes Swamp which sings somewhat like tchut a-worieter-worieter-worieter-woo. 

The greater part of the large sugar maples on the Common leaf. Large red maples generally are late to leaf. 

H. D. Thoreau,  Journal, May 15, 1855

A white throat, was whitish, streaked with dark, beneath, darker tail and wings, and maybe olivaceous shoulders; bright yellow within bill. Probably M. Cooperi. See  June 5, 1856. ("The Muscicapa Cooperi sings pe pe pe’, sitting on the top of a pine, and shows white rump”); June 8, 1856 ("At Cedar Swamp, saw the pe-pe catching flies like a wood pewee, darting from its perch on a dead cedar twig from time to time and returning to it. ...black crown with some crest, yellowish (?) bill, gray-brown back, black tail, two faint whitish bars on wings, a dirty cream-white throat, and a gray or ash white breast and beneath, whitest in middle"); June 10, 1855 ("Nuttall thus describes the Muscicapa Cooperi, olive sided flycatche  or pe - pe . . . head darker, without discolored spot ; sides olive grey; lateral space beneath the wing white; lower mandible purplish horn color; tail nearly even and extending but little beyond the closed wings. ” No white on tail") See also A Book of the Seasons,  by Henry Thoreau, the Olive-sided flycatcher or pe-pe