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| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 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 |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Body Fat (total or %) | see citation | figure relating fat content to body weight | g | Both Male and Female | Both Adults and Juveniles | Brooks Island, San Francisco Bay | 44 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Population Density | 550 | peak density | #/ha | Both Male and Female | Both Adults and Juveniles | Russell Reservation | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Metabolic Rate | OC = 1.94W^-0.209 | equation relating basal oxygen consumption (OC; ml O2/g/hr) to body weight (W, g; 260-800g) | ml O2/g/hr | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | range of means for 2 yrs | 6.1 - 7.3 | young/litter | Female | Adult | Camp Ohlone [lat., 37^o29'N; long., 121^o45'W] | 11/yr | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Inhalation Rate | 297 (10C); 238 (20C); 137 (30C) | inhalation rates at ambient temperatures (10-30C) | ml/min | Not Reported | Not Reported | 6/group | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Time of Torpor or Hibernation | see citation | figure of seasonal activity patterns, including hibernation | Both Male and Female | Both Adults and Juveniles | Santa Barbara; Bell Ranch; Hastings Reservation | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | see citation | figure of monthly changes in body weight | g | Both Male and Female | Both Adults and Juveniles | Calaveras Reservior | 2 - 106/sample | Exposure Factor Datasets | |
| Body Weight - Mean | 500 - 800 | g | Both Male and Female | Adult | Calaveras Reservoir | Not Reported | Exposure Factor Datasets | ||
| Longevity | 3+ | oldest individuals recaptured | yrs | Male | Adult | Calaveras Reservoir | 2 | Exposure Factor Datasets | |
| Home Range | 0.36 | above ground area occupied for at least one mo | 0.06 - 0.74 | acres | Male | Adult | Calaveras Reservoir | 21 | Exposure Factor Datasets |
| Home Range | 0.59 | above ground area occupied for at least one mo | 0.12 - 1.62 | acres | Female | Adult | Calaveras Reservoir | 51 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Food Ingestion Rate | range of total food weight for observed individuals | 6.85 - 29.3 | g dry wt/d | Both Male and Female | Adult | San Joaquin Experimental Range | 6 | Exposure Factor Datasets | |
| Time of Mating/ Laying | Jan. - Feb. | Both Male and Female | Adult | San Joaquin Experimental Range | Exposure Factor Datasets | ||||
| Survival/ Mortality | % tagged young surviving to following year to become breeding adults; range over 3 yrs | 36.1 - 51.6 | % | Both Male and Female | Juvenile | San Joaquin Experimental Range | 321 - 339/yr | Exposure Factor Datasets | |
| Home Range | 400 | diameter of "typical" home range | ft | Both Male and Female | Both Adults and Juveniles | San Joaquin Experimental Range | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Time of Mating/ Laying | Feb. - Mar. | Both Male and Female | Adult | University of California, Santa Cruz Campus [lat., 37^oN; long., 122^oW] | Not Reported | Exposure Factor Datasets | |
| Age at Sexual Maturity | 1 | yr | Both Male and Female | Adult | University of California, Santa Cruz Campus [lat., 37^oN; long., 122^oW] | Not Reported | Exposure Factor Datasets |
| Clutches or Litters per year | 1 | litter/yr | Female | Adult | University of California, Santa Cruz Campus [lat., 37^oN; long., 122^oW] | 128 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Dietary Composition | see citation | list of mean % of 25 items in monthly diets, based on stomach contents | % | Not Reported | Not Reported | San Joaquin Experimental Range | 12-40/mo | Exposure Factor Datasets |
| 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 |
| 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 |
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