Barn Owl Pellet Interactive Study Results

The pellet exterior consisted of fur
Northeast   95.3%
Northwest   97.6%
Southeast   93.8%
Southwest   95.6%
The pellet exterior consisted of feathers
Northeast   14.7%
Northwest   13.4%
Southeast   22.2%
Southwest   14.5%
  
The pellet exterior consisted of other items
Northeast   0%
Northwest   7.9%
Southeast   14.4%
Southwest   16%
Average number of pelvic bones found per pellet
Northeast   3.2
Northwest   3.4
Southeast   3.4
Southwest   4
  
Average number of vertebras found per pellet
Northeast   9.6
Northwest   10.6
Southeast   10.7
Southwest   11.5
Average number of scapulas found per pellet
Northeast   2.7
Northwest   3
Southeast   3.1
Southwest   3.7
  
Average number of ribs found per pellet
Northeast   17.1
Northwest   17
Southeast   14.2
Southwest   19.2
Average number of tibias found per pellet
Northeast   4.5
Northwest   4.4
Southeast   3.5
Southwest   5.2
  
Average number of humeri found per pellet
Northeast   3.9
Northwest   3.8
Southeast   3.6
Southwest   4.7
Average number of femurs found per pellet
Northeast   3.8
Northwest   3.8
Southeast   3.3
Southwest   4.6
  
Percentage of owl pellets with rat skulls
Northeast   44.8%
Northwest   43.8%
Southeast   48%
Southwest   41.3%
Average number of rat skulls in pellets containing rat skulls
Northeast   2.4
Northwest   1.8
Southeast   2.1
Southwest   2.9
  
Percentage of owl pellets with mice skulls
Northeast   31.6%
Northwest   31.1%
Southeast   28.7%
Southwest   36%
Average number of mice skulls in pellets containing mice skulls
Northeast   2.4
Northwest   2
Southeast   2.1
Southwest   3.5
  
Percentage of owl pellets with vole skulls
Northeast   33.3%
Northwest   35.8%
Southeast   30.9%
Southwest   32.3%
Average number of vole skulls in pellets containing vole skulls
Northeast   2.3
Northwest   1.8
Southeast   2.2
Southwest   3.6
  
Percentage of owl pellets with shrew skulls
Northeast   24%
Northwest   23.5%
Southeast   28.2%
Southwest   23.7%
Average number of shrew skulls in pellets containing shrew skulls
Northeast   2.5
Northwest   2.1
Southeast   2.1
Southwest   4.5
  
Percentage of owl pellets with mole skulls
Northeast   11.5%
Northwest   9%
Southeast   13.9%
Southwest   11.8%
Average number of mole skulls in pellets containing mole skulls
Northeast   2.8
Northwest   1.7
Southeast   3
Southwest   6.5
  
Percentage of owl pellets with bird skulls
Northeast   10.8%
Northwest   9.4%
Southeast   12.6%
Southwest   9.8%
Average number of bird skulls in pellets containing bird skulls
Northeast   3.6
Northwest   2.1
Southeast   2.5
Southwest   5.9