Long eared Owl pellets

Hi all,i have been searching through 140 LEO pellets recently and found these bits of bird beaks ,I also found 1 dunnock feather  in and amongst all the fur.Can any one put them to family or know a good web site or blogg that may help.??135 Field Vole,1 Mole,1 Pygmy shrew,1 wood Mouse,3 caterpillar skulls, 30 beetle larvae,1 adult beetle,1 skin Moth larvae,1 parasitic fly sp and at least 5 bird sp.??