494 
ECONOMIC RELATIONS OF OUR BIRDS. 
Tabular Summary of Economic Relations showing the number of specimens con¬ 
taining animal and vegetable food, and the number of insects, spiders, 
worms and snails taken from the stomachs, classified as to economic relations 
under the heads Beneficial, Detrimental and Unknown Relations. 
Number and Name op Speci¬ 
mens Examined. 
Classification 
OF Food. 
Ratios Represented by Lines. 
17 
• 
Animal food ...... 
Of seventeen Black and 
White Creepers ex¬ 
amined . 
Vegetal food. 
'S 
Beneficial. 
6 
o 
o 
34 
Detrimental. 
EU9SP.’S?!99Sm9l!l 
16 
79 
twow - .’ri, . ..PWfWf IBII 
33 
Of thirty-three Ten¬ 
nessee Warblers ex- 
0) 
Vegetal food. 
c3 
Beneficial. 
amined. 
12 
31 
d 
o 
90 
112 
II mill mil 1 mill ii iiii 
o 
Unknown. 
Bl'll'll Hill'III III.. 
■ 
12 
Of twelve Black- 
throated Green War- 
OP 
Vegetal food. 
c3 
Beneficial. 
biers examined. 
5 
d 
o 
O 
9 
Detrimental. 
11 
46 
Of six Black-throated 
Blue Warblers exam¬ 
ined . 
4 ) 
d 
I 
c 
o 
o 
Animal food. 
mm 
Vegetal food. 
Beneficial. 
2 
Detrimental. 
1 
22 
Unknovm. 
Of twenty-one Yellow- 
rumpecl Warblers ex¬ 
amined . 
21 
1 
2 
5 
19 
■d 
O) 
o 
a 
o 
o 
Animal food. 
Vegetal food 
5 
25 
75 
Beneficial .. 
Detrimental , 
Unknown. .. 
Of nine Hemlock War¬ 
blers examined.... 
■2 
.g 
d 
o 
Q 
Animal food. 
Vegetal food 
1 
29 
26 
Beneficial ... 
Detrimental 
Unknown... 
