470 
ECONOMIC RELATIONS OF OUR BIRDS. 
Table slioioing the nuraher of birds which had eaten (1) vegetal and (2) animal 
food, and the economic character of the latter fmostly insects) under the 
heads Beneficial, DetHmental and Unknoivn Relations. 
Number and Name of Speci¬ 
mens Examined. 
CtASSIFICATION 
OF Food. 
Eatios Represented by Lines. 
Of thirty-seven Robins 
examined. 
34 
Animal food.. 
13 
(D 
1 
a 
Vegetal food . 
29 
60 
Detrimental.. 
6 
o 
u 
10 
Beneficial .... 
17 
56 
Unknown. 
Of two Wood Thrushes 
examined. 
2 
Animal food.. 
■ 
1 
O 
Vegetal food . 
1 
Detrimental.. 
0, 
o 
o 
Beneficial .... 
2 
4 
Unknown. 
Of nine Hermit 
Thrushes examined . 
9 
Animal food.. 
Hi 
3 
o 
Vegetal food . 
■ 
5 
7 
Detrimental.. 
a 
O 
O 
Beneficial .... 
9 
28 
Unknown. 
mmMmmmiam 
16 
Animal food. . 
6 
'd 
o 
Vegetal food . 
BBEM 
4 
s 
10 
Detrimental.. 
SBBBam 
0 
1 
O 
o 
1 
Beneficial .... 
1 
13 
26 
Unknown. 
Of eighteen Olive- 
backed Thrushes ex¬ 
amined . 
5 
Animal food.. 
Em 
3 
'd 
Vegetal food . 
m 
Of seven Wilson’s 
Thrushes examined. 
2 
0 
4 
Detrimental.. 
m 
2 
o 
a 
2 
Beneficial .... 
1 
4 
10 
Unknown. 
17 
Animal food 
13 
(D 
0 
Vegetal food . 
Of twenty-two C a t - 
birds examined .... 
3 
8 
Detrimental.. 
nm 
2 
O 
o 
2 
Beneficial .... 
1 
15 
28 
Unknown. 
Of ten Brown Thrushes 
examined. 
10 
7 
8 
1 
7 
4 ) 
s 
rt 
o 
O 
Animal food. 
Vegetal food 
V 
3 
11 
Detrimental. 
Beneficial ... 
Unknown.... 
