CONCORD 
1892 
ember 25 
Estabrook 
7/o ods 
(i) spent the forenoon in the Estabrook woods with 
Mr. Buttrick. We started in past Mr. Pratt’s, followed the 
wood-path through the "common lot" to "Hubbard Pastures" 
where we "salted" the cows, kept on beyond to the head of 
Ash Swamp, and returned by the Estabrook Road and Derby's Lane. 
It was a great day for Blue Jays. I am not sure that I 
ever savir more within the same time and distance. They were 
Blue Jays 
Black-noils 
flying about everywhere in the fields, swamps and in every 
kind of woodland. I am forced to withdraw what I recorded, 
a short time since, in disparagement of the Jay's imitation 
of the screaming of the Red-shouldered Hawk. It is. usually 
shorter than the Hawk's outcry but several times to-day a 
Jay very near me deceived me perfectly. Once the screams, 
repeated a dozen or more times, came from the top of a white 
oak where several Jays were flitting about. Although I saw 
them, I was not really satisfied that there was not also a 
Buteo there, until I went to the tree and drove the Jays 
out. They were imitating this Hawk scream very generally 
to-day but I hea.rd one bona fide Buteo, also. 
fir ext to the Jays I saw more Black-polls than any 
other one species of bird. They have come late this autumn 
but to-day the woods were alive with them. They apparently 
prefer birches at this season. I saw one eating a smooth 
green caterpillar fully an inch long. With some Black-polls 
