ere found which might
have been the mouthparts of grubs.

After mid-July pellets were common under one small roost. In late July
they were scarce, even at a roost with several hundred crows. The
principal feeding grounds of crows were stubble fields and plowed
fields. All grain picked up at this time was waste. Plowing was
interrupted by rain from July 11-18 but was the major farm operation
again after July 19.

From late July into early September crows fed in plowed fields, stubble
fields, pastures, and newly mown hay fields. Pellets were scarce,
considering that hundreds of crows used the roost where pellets were
collected. Plowing was almost over by July 31. Brome grass was in full
head during the early part of this period. Corn was in the milk stage
during the early part of August but did not show up in any pellets.
Although Sudan grass was in head during the early part of this period,
other sorghum did not head out until September.

From early September to early October sorghum was in full head. The
crows spent most of their feeding time in plowed fields, stubble fields,
or pastures. Much time was spent along creeks where pools, which
contained many small fish, were drying. Pellets were common under a
small roost. Grasshoppers and beetles were the two staple foods in the
diet at this time, as shown by their high frequencies and high
percentages in pellets. The high percentage and frequency of wheat
corroborates the observation that most of the feeding was being done in
wheat fields. The relatively large percentages of fish bones, crayfish,
and snail shells can be correlated with the observation that much time
was spent by the crows at the pools in creek beds. Many ants were in the
pellets. The total percentage of animal materials in the pellets was
much higher in this period than in other periods. Plant material had
been the highest, percentagewise, during most of the summer, except in
the latter part of July. Most studies of food of the crow have shown a
higher content of animal material during the summer than does my study.
It would seem that much of the food material which did not show up in
pellets during the summer was animal material.

Grasshoppers predominated in the diet in early October; some pellets
consisted of little other than grasshopper mandibles and leg joints.
Wheat is sown in this area from September 10 to October 15, most of it
being sown after October 5, the recommended Hessian fly-free date