Barn Owl Pellet Interactive Study Results

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%
  
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
  
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
  
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
  
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
  
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
  
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
  
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
  
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
  
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
  
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