USE Fir L BIRDS 
41 
consume injurious insects, the Cat-liird will doubtless continue 
to be protected exce])t in cases of ])articularly flagrant destruc- 
tiveness. 
THE CROW AND THE BLUEJAY. 
The Crow and the various blackbirds wall at times call for radi- 
cal treatment. The writer has seen both crows and blackbirds 
hunting grassho])])ers in stubble helds and both are known to eat 
other insects, yet their food habits are such as to make their con- 
stant protection undesirable and, when necessary, the farmer should 
not hestitate to resort to extreme measures to protect his crop. 
Crows, it should be noted, eat held mice. 
Like the Crow, our Bluejay sometimes robs birds’ nests of both 
eggs and young birds. However, since he is something of an insect 
eater, and only occasionally resorts to corn or other grain, it would 
be hardly just to make war upon him. 
Interesting and valuable ])ublications u])on the subject of 
birds are Chapman’s “Bird Life” (not economic), A])])letons pub- 
lishers; “Birds in ddieir Relation to Man,” 1)y WTed and Dearliorn, 
Lip])incott ; Cha])man’s “Handbook of Birds of Eastern North 
America;” syno]Jtical and descriptive; very hel])ful in identilication, 
Appleton N Co. 
Amongst larger works, perhaps not so easily accessible to the 
amateur, are Cones’ “Key to North American Birds”; Baird, Brew- 
er N Ridgway’s “North American Birds”; several publications of 
the Department of Agriculture, for the most |)art out of ])i*int now, 
and somewhat anticpiated ; and more recently Farmers’ Bulletin 
No. 531 { U. S- Bureau of Biological Survey) “Fifty Common Birds” 
with colored illustrations (out of ])rint) ; and a lielpftd ])ublication 
u])on “Bird Houses and How to Luild Them,” by Dearborn — 
Farmers’ Bulletin No. 609, Sept. 11, 1914. 
In the United States Yearboolc for 1909, pp. 185-196 (Yearl)ook 
Se])arate No. 504) occurs an interesting article lyv McAtee on 
“Plants Useful to Attract Birds and Protect Fruit.” 
W’e may also list here the following ])ublications from the U. 
S, Department of Agriculture ; 
Farmers’ Bulletins 497, 506, 630, dealing with the economic 
value of a large number of common Inrds. Bulletin 621 of the 
Bureau of Biological Survey, entitled “How to Attract Birds in 
Northeastern United States;” also from the same Bureau, Bulletin 
185, on bird migration, and Bulletins 205 and 217, dealing with 
ducks and other water fowl. 
