Dietary Analysis of the Barn Owl

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Presentation transcript:

Dietary Analysis of the Barn Owl

Why? 1st PA Breeding Bird Atlas 1983-89 Barn Owl decrease in Pennsylvania and throughout its range 1st PA Breeding Bird Atlas 1983-89

2nd atlas 2004-2008

Barn Owl aka Monkey-Faced Owl

Owl Pellets Not poop! Undigested bones and fur Pellet ejection at the nest

Meadow Vole Microtus pennsylvanicus

Likely things you’ll find... Meadow Vole, Microtus pennsylvanicus Masked Shrew, Sorex cinereus Star-nosed Mole, Condylura cristata

Meadow Vole Microtus pennsylvanicus Herbivore Widespread Active year-round, mostly nocturnal ~5 pups, 1-5 times per year

Meadow Vole

Masked Shrew Sorex cinereus Maximum size ~8 grams Active year round May eat own weight in a day

Masked Shrew

Sorex monticolus

Sorex monticolus

Star-nosed Mole

Southern Red-Backed Vole Myodes gapperi

House Mouse Mus musculus

White-footed Mouse Peromyscus leucopus

Deer Mouse Peromyscus maniculatus

Meadow Jumping Mouse Zapus hudsonius

Woodland Jumping Mouse Napaeozapus insignis

Northern Short-tailed Shrew Blarina brevicauda

Masked Shrew Sorex cinereus

Eastern Cottontail Sylvilagus floridanus

Eastern Chipmunk Tamias striatus

Norway Rat Rattus norvegicus

European Starling Sturnus vulgaris

House Sparrow Passer domesticus

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