Concord, Mass.
1912.
May 17
[May 17, 1912]

Heavy flight of migrants arriving
during dark, rainy night.

  Chiefly sunny, partly cloudy with occasional light showers. 
Warm with strong south west to west winds. Heavy north-easterly 
storm followed by calm, warm, rainy and intensely dark night.
  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.O. Dexter had the same experience in and near the 
village of Concord. As the early morning hours were calm &
warm with the sun shining dimly through the 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 
trees or thicket. Neverless [Nevertheless] the flight was evidently a very 
general and considerable one indeed 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 W. [Blackpoll Warbler], Black-throated Blue Warbler, Lincoln's Finch, Wood Pewee, 
Hummingbird, Black-billed Cuckoo.