1893
April 25
(No 2)
Concord, Mass.
(Ball's Hill)
  At times the birches and alders in front of the
cabin were fairly alive with these beautiful little creatures
flitting actively among the branches and launching out
after flying insects. There were several Ruby-crowned Knights
with them. This day probably marks the height of
migration for all three species this spring.
[margin]Height of
migration of
D. coronata
D. hypochrysea
Reg. calendula[/margin]
  Later in the afternoon as I was on my way up
river (I returned to the Buttrick's for the night) I 
saw over thirty Swallows in a loose flock flying high
over Holden's Hill, feeding but all the while drifting
off towards the N. E. The greater number were Barn
Swallows, the balance being White-bellies.
[margin]Swallows[/margin]
  The Bittern was silent this afternoon although the
conditions seemed peculiarly favorable for "pumping".
Perhaps at this season he "pumps" only in the
early morning. My bird this morning kept it up
for half-an-hour certainly.
[margin]Bittern[/margin]
  As I was passing the swimming place on Lang's shore
a Spotted Sandpiper started from the bank and
skimmed off close over the water.
[margin]Arrival of
Spotted
Sandpiper[/margin]
  Pat reported starting three very large Ducks from
Hunt's Pond on his way down river this morning.
He says they had white necks.
[margin]Ducks[/margin]
  The grass is now green in most of the upland
fields and the river meadows are very green.