typical maximum distance between two roosting sites
mi
Both Male and Female
Adult
Superior and Ann Arbor townships
11 home ranges
Exposure Factor Datasets
Population Density
1
bird/2000 acres
Both Male and Female
Not Reported
Superior township
11 owls
Exposure Factor Datasets
Dietary Composition
white-footed mice (58.2%), meadow mice (28.0%), other small mammals (2.8%), medium sized mammals (5.1%), gamebirds and sm-med sized birds (4.8%), other birds (1.2%)
percent occurrence of prey items in pellets
Not Reported
Not Reported
Superior township
297 pellets from 14 owls
Exposure Factor Datasets
Time of Nesting
Mar 12 - Jun 4
period from earliest egg laying date to date of latest brood departure
Both Male and Female
Adult
Jackson Hole
4 nests
Exposure Factor Datasets
Time of Hatching or Parturition
Apr 14
earliest hatching date
Not Reported
Nestling
Jackson Hole
4 nests
Exposure Factor Datasets
Population Density
1
density of nesting pairs
pair/3 mi^2
Both Male and Female
Adult
Jackson Hole
4 nests
Exposure Factor Datasets
Clutch or Litter Size
2.2
2-3
eggs/clutch
Female
Adult
Jackson Hole
4 nests
Exposure Factor Datasets
Hatching Success
11
percent of eggs that failed to hatch
Not Reported
Nestling
Jackson Hole
4 nests
Exposure Factor Datasets
Fledging or Weaning Rate
2
number of fledglings produced per pair
fledglings/pair
Not Reported
Fledgling
Jackson Hole
4 nests
Exposure Factor Datasets
Territory Size
observed range of movement during nesting, based on observations of individual or pair movements