The pellet exterior consisted of fur Northeast 94.2% Northwest 96.3% Southeast 92.9% Southwest 94.6%
| The pellet exterior consisted of feathers Northeast 15% Northwest 14.4% Southeast 21.4% Southwest 15.2%
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The pellet exterior consisted of other items Northeast 0% Northwest 10.4% Southeast 15.6% Southwest 16.4%
| Average number of pelvic bones found per pellet Northeast 3.3 Northwest 3.4 Southeast 3.3 Southwest 4.1
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Average number of vertebras found per pellet Northeast 9.5 Northwest 10.7 Southeast 10.8 Southwest 12.4
| Average number of scapulas found per pellet Northeast 2.8 Northwest 3.1 Southeast 3.1 Southwest 3.5
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Average number of ribs found per pellet Northeast 16.3 Northwest 17.4 Southeast 14.4 Southwest 19.6
| Average number of tibias found per pellet Northeast 4.5 Northwest 4.4 Southeast 3.6 Southwest 5.3
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Average number of humeri found per pellet Northeast 4 Northwest 3.8 Southeast 3.6 Southwest 4.8
| Average number of femurs found per pellet Northeast 4 Northwest 3.8 Southeast 3.3 Southwest 4.8
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Percentage of owl pellets with rat skulls Northeast 42.3% Northwest 43% Southeast 47.1% Southwest 40.7%
| Average number of rat skulls in pellets containing rat skulls Northeast 2.7 Northwest 1.9 Southeast 2.1 Southwest 2.7
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Percentage of owl pellets with mice skulls Northeast 31.2% Northwest 30.3% Southeast 27.7% Southwest 35.2%
| Average number of mice skulls in pellets containing mice skulls Northeast 3 Northwest 2.1 Southeast 2.3 Southwest 3.2
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Percentage of owl pellets with vole skulls Northeast 34.5% Northwest 36.7% Southeast 30% Southwest 33%
| Average number of vole skulls in pellets containing vole skulls Northeast 2.8 Northwest 1.9 Southeast 2.4 Southwest 3.3
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Percentage of owl pellets with shrew skulls Northeast 22.4% Northwest 23% Southeast 26.4% Southwest 21.9%
| Average number of shrew skulls in pellets containing shrew skulls Northeast 3.3 Northwest 2.1 Southeast 2.5 Southwest 4.2
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Percentage of owl pellets with mole skulls Northeast 11.4% Northwest 9.5% Southeast 13.4% Southwest 10.5%
| Average number of mole skulls in pellets containing mole skulls Northeast 5.2 Northwest 2.2 Southeast 3.1 Southwest 6.4
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Percentage of owl pellets with bird skulls Northeast 11.7% Northwest 9.9% Southeast 12.5% Southwest 10.1%
| Average number of bird skulls in pellets containing bird skulls Northeast 5.2 Northwest 2.4 Southeast 2.3 Southwest 5.2
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