CONCORD, 
Heavy flight 
°f migrants 
arriving 
during 
dark , rainy 
night . 
Prothonotary 
Warbler 
at 
Ball' 
Hill 
[Despite the rain and darkness last night immense 
numbers of migrants arrived before daybreak and flooded 
the Concord country this morning. I found them swarming 
about Ball's Hill and the Farm and S. 0.Dexter had the 
same experience in and near the village of Concord. As 
the early morning hours were calm and warm with the sun 
shining dimly through thin mists, the birds scattered rather 
widely and sang freely, as is their usual custom at this 
season under such conditions. Hence there were not anywhere 
very many of them assembled in one cluster of tree or 
thicket, nevertheless the flight was evidently a very 
general andconsiderable one ideed, quite the heaviest that 
has occurred thus far this month. Species noted for first 
time were Swainson's Thrush, Alice's Thrush, Prothonotary 
Warbler, Black-poll Warbler, Black-throated Blue Warbler, 
Lincoln's Finch, Wood Pewee, Humming-bird, Black-billed Cuckoo^j 
It is my custom when sleeping in the cabin to 
open a little window by the side of my bed when I first 
awake to enjoy the early morning singing without the trouble 
of rising at an inconvenient hour. When I did so at 5.30 
this morning, my ears were at once greeted by an unfamiliar 
song,very loud and incisive and evidently coming from near 
at hand. Scaree more than half awake, I listened to it for 
ten minutes or more without getting any clue as to the 
identity of its author. It seemed most like the song of a 
Swamp Sparrow, but was louder and the notes were firmer and 
