Concord, Mass.
1903.
October &
November
(No.5
  Migratory flights of Crows were passing almost daily during
the latter half of October and the first few days of November.
As a rule the birds appeared in the early part of the forenoon
in loose, straggling flocks containing anywhere from fifteen or twenty
to one hundred and fifty numbers. These were often so scattered
that not more than ten or a dozen would be in flight at once
but on the other hand they formed a practically unbroken, narrow
stream that flowed unceasingly for half an hour or more.
The direction of their flight was invariably south-west. When 
the weather was calm they usually passed at a height of
at least 100 or 200 feet but if there was a strong north west
wind they kept within forty or fifty feet of the earth and
took advantage of the shelter offered by my hill or piece of
woods. As a rule they pushed steadily onward without alighting 
but on a few occasions as many as fifty to seventy birds
were seen feeding together in the meadows near the river
in the early morning as well as at other hours of the day.
  The migration of the Blue Jays was also well marked although
less heavy than usual. It passed about the time the maple
leaves were falling when, for several days in succession, the
woods seemed alive with the noisy brilliantly colored birds.
  Bluebirds were exceedingly abundant but they departed early
this year the country being completely devoid of them before
the close of October. I saw no very large flocks but they
were scattered about everywhere in small parties which
often contained a number of Yellow-rumped Warblers. When
the bluebirds rose high in air and moved off to the Southward
as they often did at almost every hour of the day the Warblers
frequently accompanied them.