Concord, Mass.
(Ball's Hill)
1900.
April 29
(No 2)
  I saw five Yellow Palm Warblers (two in one place, three
in another), two male Yellow-rumps, a Ruby-crowned Kinglet
in full song, two Black & White Creepers & a few Robins, 
Song Sparrows, Jays, etc. 
  The song of the Yellow Palm warbler is very variable
or rather different individuals sing very differently for
I do not find that the same bird's song varies at
different times. The song that I heard this afternoon is most
like that of the Yellow-rump but weaker or more listless
and also more broken. Some birds sing very like the
Chipping Sparrow. One that I heard this morning uttered
 a loud, dry, prolonged chatter quite different from
the song of any bird that I can think of.
Song of 
Yellow Palm 
Warbler.
  Crossed the river to the West Bedford Shore at 
11 A.M. & walked up the railroad to dig some
plants. The sun was very hot, the woods apparently
nearly barren of bird life but alive with Antiopa
butterflies. A Red-shouldered Hawk flew from
an oak near the place where we landed.
48