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Displaying 841 - 880 of 1626 datapoints
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Bubo virginianus

Citation:

Hawks, Owls and Wildlife

Author(s)
Craighead, John J. and Frank C. Craighead, Jr.
Pages
443
Publisher
Dover Publications, Inc.
Year
Exposure Endpoint Type Endpoint Value Endpoint Description Range Units Sex Life Cycle Stage Location Sample Size Type
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 0.45-1.11 mi^2 Not Reported Adult Jackson Hole 4 birds Exposure Factor Datasets
Dietary Composition white-footed mice (3.6%), meadow mice (64.5%), shrews (0.3%), weasels (0.6%), red squirrel (0.3%), pocket gopher (23.5%), snowshoe rabbit (2.8%), ruffed grouse (1.4%) sage grouse (0.3%), mallard (0.6%), sm-med sized birds (1.4%), sucker (0.8%) percent occurrence of prey items in diet during nesting % Not Reported Not Reported Jackson Hole 361 food items, 4 nests Exposure Factor Datasets
Food Ingestion Rate averages of food amounts eaten per day 82-85 g Both Male and Female Not Reported 2 birds Exposure Factor Datasets

Falco sparverius

Citation:

Hawks, Owls and Wildlife

Author(s)
Craighead, John J. and Frank C. Craighead, Jr.
Pages
443
Publisher
Dover Publications, Inc.
Year
Exposure Endpoint Type Endpoint Value Endpoint Description Range Units Sex Life Cycle Stage Location Sample Size Type
Population Density 1 density of nesting pairs pair/1.1 mi^2 Both Male and Female Adult Jackson Hole 10 nests Exposure Factor Datasets
Clutch or Litter Size 4.4 5 (max) eggs/clutch Female Adult Jackson Hole 10 nests Exposure Factor Datasets
Hatching Success 2 percent of eggs that failed to hatch % Not Reported Nestling Jackson Hole 10 nests Exposure Factor Datasets
Time of Nesting May 20 to Jul 20 period from earliest egg laying date to date of latest brood departure Both Male and Female Adult Jackson Hole 11 nests Exposure Factor Datasets
Time of Hatching or Parturition Jun 20-Jun 22 dates of earliest and latest hatching Not Reported Nestling Jackson Hole 11 nests Exposure Factor Datasets
Territory Size observed range of movement, based on observations of individuals 0.65-2.32 mi^2 Not Reported Adult Superior Township 8 birds Exposure Factor Datasets
Fledging or Weaning Rate 4.2 number of fledglings produced per pair fledglings/pair Not Reported Fledgling Jackson Hole 10 nests Exposure Factor Datasets
Territory Size observed range of movement during nesting, based on observations of individual or pair movements 0.16-1.93 mi^2 Not Reported Adult Jackson Hole 11 birds Exposure Factor Datasets
Dietary Composition white-footed mice (6.0%), meadow mice (78.9%), shrews (1.3%), pocket gopher (1.0%), uinta ground squirrel (0.3%), sm-med sized birds (5.7%), insects (59.9%) percent occurrence of prey items in pellets during nesting % Not Reported Not Reported Jackson Hole 299 pellets from 8 nests Exposure Factor Datasets
Food Ingestion Rate averages of food amounts eaten per day 18-21 g Both Male and Female Not Reported 3 birds Exposure Factor Datasets

Colaptes auratus

Citation:

Molt in flight feathers of flickers

Author(s)
Test, Frederick H.
Pages
63-72
Year
Volume
47
Exposure Endpoint Type Endpoint Value Endpoint Description Sex Life Cycle Stage Sample Size Type
Time of Molt June-July date of onset of postjuvenal and adult molt Not Reported Both Adults and Juveniles 2500 birds Exposure Factor Datasets
Citation:

Food of the woodpeckers of the United States

Author(s)
Beal, F.E.L.
Pages
7-64
Publisher
Government Printing Office
Year
Exposure Endpoint Type Endpoint Value Endpoint Description Sex Life Cycle Stage Sample Size Type
Dietary Composition animal food (67.71%), vegetable food (32.26%) percent composition of stomach contents Not Reported Not Reported 183 birds Exposure Factor Datasets
Dietary Composition predacious ground beetles (3.89%), other beetles (2.66%), ants (53.82%), Hemiptera (1.84%), caterpillars (2.12%), Orthoptera (1.45%), other insects and spiders (1.96%), grain (2.26%), seeds (19.59%), fruit (10.28%) percent composition of stomach contents Not Reported Not Reported 183 birds Exposure Factor Datasets

Vireo bellii ssp. pusillus

Citation:

Riparian forest as habitat for the least Bell's vireo

Author(s)
Gray, M. Violet and James M. Greaves
Pages
605-611
Publisher
University of California Press
Year
Exposure Endpoint Type Endpoint Value Endpoint Description Range Units Sex Life Cycle Stage Location Sample Size Type
Territory Size nesting territory size 0.2-1.6 ha Both Male and Female Adult Gibraltar Reservoir 43-48 pairs (2 yrs) Exposure Factor Datasets
Population Density range of nesting density over two years 43-48 pairs/243 ha Both Male and Female Adult Gibraltar Reservoir 43-48 pairs (2 yrs) Exposure Factor Datasets
Fledging or Weaning Rate percent of nesting pairs that successfully raised at least one young (range over two years) 26-32 % Both Male and Female Adult Gibraltar Reservoir 43-48 pairs (2 yrs) Exposure Factor Datasets
Hatching Success range in proportions of total eggs hatching vs. total eggs laid (for two years) 147/238 to 147/262 eggs hatched/eggs produced Not Reported Hatchling Gibraltar Reservoir 238-262 eggs (two yrs) Exposure Factor Datasets
Fledging or Weaning Rate range in proportions of total chicks fledging vs. total chicks hatched (for two years) 85/147 - 91/147 chicks fledged/chicks hatched Not Reported Fledgling Gibraltar Reservoir 147 eggs hatched (2 yrs) Exposure Factor Datasets
Clutches or Litters per year annual clutch numbers per pair observed over 2 years 1-2 clutches/yr Both Male and Female Adult Gibraltar Reservoir 43-48 pairs (2 yrs) Exposure Factor Datasets
Foraging Distance up to several hundred yards maximum observed distance travelled by birds from the nest Both Male and Female Adult Gibraltar Reservoir 32 pairs (1 yr) Exposure Factor Datasets
Time of Migration or Dispersal mid Jul to early Sep period of departure from the breeding area by migrants Both Male and Female Both Adults and Juveniles Gibraltar Reservoir Not Reported Exposure Factor Datasets
Citation:

Nest-site tenacity of least Bell's vireos

Author(s)
Greaves, James M.
Pages
50-54
Year
Volume
18
Exposure Endpoint Type Endpoint Value Endpoint Description Units Sex Life Cycle Stage Location Sample Size Type
Fledging or Weaning Rate 63 percent of birds that successfully fledged one young % Male Adult Gibraltar Reservoir 98 birds Exposure Factor Datasets
Fledging or Weaning Rate 66 percent of birds that successfully fledged one young % Female Adult Gibraltar Reservoir 98 birds Exposure Factor Datasets
Survival/ Mortality 48/312 proportion of young banded as nestlings or fledglings returning to study area in subsequent yrs birds returning/birds banded Both Male and Female Juvenile Gibraltar Reservoir 312 birds Exposure Factor Datasets
Citation:

Endangered status and strategies for conservation of the least Bell's vireo (Vireo bellii pusillus) in California

Author(s)
Franzreb, Kathleen E.
Pages
43-49
Year
Volume
18
Exposure Endpoint Type Endpoint Value Endpoint Description Sex Life Cycle Stage Sample Size Type
Population Density review historical and recent population data Not Reported Adult Not Reported Exposure Factor Datasets
Fledging or Weaning Rate review reproductive success data Adult Not Reported Exposure Factor Datasets
Citation:

The least Bell's vireo in California: A de facto endangered race

Author(s)
Goldwasser, Sharon, David Gaines and Sanford R. Wilbur
Pages
742-745
Year
Issue
5
Volume
34
Exposure Endpoint Type Endpoint Value Endpoint Description Range Units Sex Life Cycle Stage Location Sample Size Type
Population Density number of singing males per linear km of suitable habitat 3-5 birds/km Male Adult various CA locations 8 survey sites Exposure Factor Datasets
Fledging or Weaning Rate 21 percent of active nests that fledged at least one young % Both Male and Female Adult various CA locations 14 nests Exposure Factor Datasets

Vireo bellii

Citation:

Observations on the nesting sucess of Bell's vireos in southern Arizona

Author(s)
Clark, Clarence F.
Pages
117-120
Year
Volume
19
Exposure Endpoint Type Endpoint Value Endpoint Description Units Sex Life Cycle Stage Location Sample Size Type
Hatching Success 84 percent of eggs hatched of total number laid % Not Reported Hatchling upper Santa Cruz River 24 nests, 70 eggs Exposure Factor Datasets
Fledging or Weaning Rate 59.9 percent of eggs producing fledglings of total eggs laid % Not Reported Hatchling upper Santa Cruz River 24 nests, 70 eggs Exposure Factor Datasets
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