12 
Report on the Food Found in 
The Rook. 
Monthly Summary, 1912. 
Month. 
Harmful 
| Insects. 
Harmful 
Arachnids. 
Harmful 
Myriapoda. 
Harmful 
Crustacea. 
Harmful 
Mollusca. 
Harmful 
Seeds. 
Beneficial 
Insects. 
Beneficial 
Arachnids. 
- «« 
S’S 
0 ft 
Hg 
s k 
ms 
Beneficial 
Crustacea. 
Beneficial 
Mollusca. 
Grain. 
Neutrals. 
Number of 
Birds. 
January 
,1 
O 
O 
1 
O 27 
0 
O O 
: 
0 
O 
O 
13 
0 
4 
February 
64 
O 
O 
0 6 
2 
4 : 0 
0 
3 
O 
221 
12 
32 
March 
65 
O 
O 
0 5 
O 
2 O 
1 
0 
0 
232 
2 
18 
April 
148 
O 
O 
0 3 
2 
7 1 0 
0 
0 
O 
520 
O 
54 
May 
.0 
O 
O 
0 1 
0 
O O 
0 
8 
O 
l6? 
0 
8 
June . . 
52 
O 
O 
0 0 
0 
4 0 
0 
0 
O 
72 
O 
8 
July . . 
9 
O 
0 
0 0 
0 
1 0 
0 
0 
0 
11 
O 
2 
i \ U ^ U b 1 • • 
September 
• — 
— 
— ■ 
— 
— 
— 
October 
1 1 
° 
O 
0 1 
0 
0 0 
0 
0 
0 
228 
O 
1 1 
November 
30 
O 
O 
o ; 0 
0 
0 | 0 
0 
0 
O 
43 
O 
4 
December 
1 
O 
O 
0 0 
0 
0 0 
• 
0 
0 
0 
135 
O 
5 
Total 
397 
O 
O 
0 43 
4 
W 
CO 
0 
1 
1 1 
0 
1491 
14 
146 
Summary, 1912. 
From the table for this year it will be seen that, as regards 
the months in which birds were examined, the rook has been 
found to be doing much more harm than good in 7 months, 
and slightly more harm in 2 months. The only month in which 
rooks did slightly more good than harm was in January, and 
then only 4 birds were examined, all shot at the same place on 
the same day. All these had eaten a number of harmful 
mollusca. 
The 146 birds examined were found to contain 1,491 grains 
and husks of corn, and also 18 beneficial insects, and 12 
beneficial worms, myriapoda, etc. ; but against these must be 
put 397 harmful insects, 43 harmful mollusca and 4 harmful 
plant seeds. 
From February to April and October to December the food 
largely consisted of grain, but the rooks appeared to take it at 
all times in quantity except in May and July. From this year’s 
record it appears that the rook is certainly much more harmful 
