56 
BULLETIN 621, U. S. DEPARTMENT OF AGRICULTURE. 
digestible food as spiders and caterpillars, to the time when, fully 
fledged, they relish hard-shelled beetles, crustaceans, small mammals, 
and grain, a diet differing but slightly from that of the parents. The 
series of stomachs examined includes young of all ages, and, as the 
various stages of growth are about equally represented numerically, 
the percentages derived may be considered as approximately a true 
average for the nestling. A diagrammatic representation of the food 
of these young birds is presented in figure 3 and a tabular statement 
showing percentages is given in Table IV, below. 
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Fig. 3. — Food of nestling crows. The proportions of the various elements are represented 
by the relative sizes of the different sectors. Table IV presents the same information 
in percentages. 
Table IV. — Percentages of the principal food items of the nestling crow. 
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1.57 
1.60 
6.22 
2.61 
3.95 11.91 
4 58 
