SummaryTable 3. Average, Maximum, and Minimum Percentages of Food Residues in Pellets Collected at Wintering Crow Roosts in the Western Part of the Study Area—1952-53-54.Table 2. Frequencies of Occurrence of Food Residues in Pellets Collected in the Eastern Part of Harvey County—1953.
| April 6-19 | June 15-28 | June 29-July 12 | July 13-26 | July 27-Aug. 9 | Aug. 10-23 | Sept. 7-20 | Sept. 21-Oct. 4 | Oct. 5-18 | Oct. 19-Nov. 1 | Nov. 2-15 | Nov. 16-29 | Nov. 30-Dec. 13 |
| No. of pellets | 9 | 7 | 6 | 19 | 18 | 5 | 57 | 29 | 27 | 24 | 25 | 7 | 8 |
| wheat | 6 | 3 | 1 | 18 | 16 | 4 | 27 | 12 | 10 | 15 | 13 | 4 | 6 |
| sorghum | | | | | 1 | | 20 | 12 | 10 | 12 | 12 | 4 | 2 |
| sunflower seed | | | | | | | | | | | | 2 | |
| oats | 8 | | | 1 | | | | | | | | | |
| brome grass | | | | 2 | 10 | 4 | | | | | | | |
| corn | | | | | | | | | | 3 | 3 | 1 | 2 |
| cherry | | 3 | 1 | | | | | | | | | | |
| grass seed | | | | | | | 11 | | | | | | |
| spurge | | | 1 | 1 | | | | | | 1 | | | |
| grape | | | | | | | 1 | | | | | | |
| misc. plant | | | | 2 | 1 | | | 2 | 1 | 1 | 3 | 1 | 2 |
| beetle (scarabaeid) | | 4 | 1 | | | | | | | | | | |
| beetle (other) | 4 | 1 | 4 | 19 | 5 | 5 | 39 | 15 | 17 | 16 | 14 | 4 | 1 |
| grasshopper | | 1 | 1 | 12 | 6 | 5 | 39 | 22 | 24 | 12 | 18 | 3 | 6 |
| ant | | | | | | | 4 | | | | | | |
| bug (hemipteran) | | | | 1 | | | | | | | | | |
| misc. insect | | | | | | | 3 | 1 | | | | | |
| crayfish | 1 | 1 | 3 | | 1 | 1 | 3 | 2 | 2 | 2 | | | |
| snail | | | | | 1 | | 7 | 4 | 1 | 4 | 1 | | |
| fish | | | | 2 | | 1 | 28 | 14 | 7 | 7 | 2 | | |
| bird | | | 1 | | | | | | | | | | |
| eggshell | | | | 1 | 1 | 2 | 10 | 5 | 8 | 1 | 1 | 1 | |
| mammal | 2 | 2 | | | 4 | 2 | 8 | 3 | 5 | 5 | 8 | 1 | 5 |