ECONOMIC RELATIONS OF OUR BIRDS. 
i83 
Family PARIDiE: Titmice. 
Fig. 109. 
Tabular Summary of Economic Relations showing the number of specimens con¬ 
taining animal and vegetable food, and the number of insects and spiders 
taken from the stomachs, classified as to economic relations under the heads 
Beneficial, Detrimental and Unknoivn Relations. 
Number Aim Name op Speci¬ 
mens Examined. 
Classification 
OF Food. 
Ratios Represented by Lines. 
12 
Animal food. 
1 
O 
Vegetal food. 
a 
Of twelve Black-capped 
, Chickadees examined... 
2 
2 
Beneficial . . 
I 
8 
o 
Detrimental. 
o 
17 
BonnniosH^i 
10 
Unknown. 
37 
Table showing the kinds and number of insects and spiders eaten by the Black- 
capped, Chickadee. 
Number and Name of Speci¬ 
mens Examined. 
5 
7 
1 
Of twelve Black-capped 
Chickadees examined. .. 
2 
12 
'3 
01 
.g 
5 
c 
o 
a 
7 
1 
Classification 
OF Food. 
Ratios Represented by Lines. 
10 
Caterpillars. 
13 
Beetles. 
3 
Heteroptera. 
■ 
2 
Spiders. 
9 
• 
42 
Adult forms. 
14 
LarvEE. 
5 
Insect eggs. 
■■ 
