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| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Dietary Composition | vertebrate (89.9%), invertebrate (10.1%) | diet composition by percent biomass in pellets | Both Male and Female | Adult | Columbia Basin | 769 pellets | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 8-12 | eggs/clutch | Female | Adult | Umatillo and Morrow counties | 4 burrows | Exposure Factor Datasets | ||
| Hatching Success | based on number of young observed at burrow | 80-91 | % | Both Male and Female | Hatchling | Umatillo and Morrow counties | 4 burrows | Exposure Factor Datasets | |
| Time of Mating/ Laying | April | Female | Adult | Umatillo and Morrow counties | 4 burrows | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Population Density | 7.8 | based on Christmas bird counts 1954-1986 | 2.3 (SD) | per 1,000 mi | Both Male and Female | Both Adults and Juveniles | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Population Density | 2 | pairs/6669 ha | Both Male and Female | Adult | Columbia River | Not Reported | Exposure Factor Datasets |
| Fledging or Weaning Rate | 2.5 | young/occupied nest | Both Male and Female | Adult | Columbia River | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Dietary Composition | mammals (85), insects (170), birds (3), spiders (0), reptiles (1) | number of prey items found in sample pellets | Both Male and Female | Both Adults and Juveniles | Crooked River National Grassland | 60 pellets | Exposure Factor Datasets |
| Dietary Composition | mammals (28), insects (22) | number of prey items found in sample pellets | Both Male and Female | Both Adults and Juveniles | Crooked River National Grassland | 20 pellets | Exposure Factor Datasets |
| Dietary Composition | mammals (414), insects (259), birds (3), spiders (2) | number of prey items found in sample pellets | Both Male and Female | Both Adults and Juveniles | Crooked River National Grassland | 228 pellets | Exposure Factor Datasets |
| Dietary Composition | mammals (50), insects (108), birds (1) | number of prey items found in sample pellets | Both Male and Female | Both Adults and Juveniles | Crooked River National Grassland | 39 pellets | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 78 | total number of young observed on study site | young/study site | Both Male and Female | Juvenile | Albuquerque | 15 pairs | Exposure Factor Datasets |
| Fledging or Weaning Rate | 4.9 | fledglings/pair | Both Male and Female | Fledgling | Albuquerque | 15 pairs | Exposure Factor Datasets | |
| Time of Migration or Dispersal | August (begin) | Both Male and Female | Both Adults and Juveniles | Albuquerque | 15 pairs | Exposure Factor Datasets | ||
| Time of Mating/ Laying | third week of March (begin) | Female | Adult | Albuquerque | 15 pairs | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | 146 | 1.9 (SE) | g | Male | Adult | Rocky Mountain Arsenal National Wildlife Area | 38 birds | Exposure Factor Datasets | ||
| Body Weight - Mean | 156 | 3.6 (SE) | g | Female | Adult | Rocky Mountain Arsenal National Wildlife Area | 31 birds | Exposure Factor Datasets | ||
| Clutch or Litter Size | 4.38 | mean productivity | 2-10 | chicks/nesting territory | Both Male and Female | Adult | Rocky Mountain Arsenal National Wildlife Area | 33 nests | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Dietary Composition | mammals (18.9%), birds (3.9%), insects (29.9%), vegetation (71.3%) | mean percent occurrence in pellets | Both Male and Female | Not Reported | Oakland Airport | 209 pellets | Exposure Factor Datasets | ||
| Dietary Composition | mammals (31.4%), birds (5.9%), insects (28.6%), vegetation (61.0%) | mean percent occurrence in pellets | Both Male and Female | Not Reported | Oakland Airport | 608 pellets | Exposure Factor Datasets | ||
| Dietary Composition | mammals (41.2%), birds (2.0%), insects (23.3%), vegetation (55.5%) | mean percent occurrence in pellets | Both Male and Female | Not Reported | Oakland Airport | 366 pellets | Exposure Factor Datasets | ||
| Dietary Composition | mammals (35.7%), birds (1.3%), insects (27.7%), vegetation (57.4%) | mean percent occurrence in pellets | Both Male and Female | Not Reported | Oakland Airport | 929 pellets | Exposure Factor Datasets | ||
| Body Weight - Mean | 172.0 | 145.0-191.3 | g | Male | Not Reported | Oakland Airport | 12 birds | Exposure Factor Datasets | |
| Body Weight - Mean | 168.0 | 125.6-210.0 | g | Female | Not Reported | Oakland Airport | 10 birds | Exposure Factor Datasets | |
| Territory Size | 1.98 | 0.1-4.0 | ac | Both Male and Female | Adult | Oakland Airport | 6 pairs | Exposure Factor Datasets | |
| Clutch or Litter Size | mean annual productivity | 1.7-2.2 | young/breeding adult | Both Male and Female | Adult | Oakland Airport | 18 birds | Exposure Factor Datasets | |
| Survival/ Mortality | 70 | % | Both Male and Female | Juvenile | Oakland Airport | 40 birds | Exposure Factor Datasets | ||
| Survival/ Mortality | 19 | % | Both Male and Female | Adult | Oakland Airport | 18 birds | Exposure Factor Datasets | ||
| Survival/ Mortality | 18 | % | Both Male and Female | Nestling | Oakland Airport | 40 birds | Exposure Factor Datasets | ||
| Time of Migration or Dispersal | Sep, Jan | Both Male and Female | Juvenile | Oakland Airport | Not Reported | Exposure Factor Datasets | |||
| Time of Molt | Jul (begin) | Both Male and Female | Adult | Oakland Airport | Not Reported | Exposure Factor Datasets | |||
| Fledging or Weaning Rate | proportion of nesting pairs that successfully fledged young (over two years) | 53.3-88.8 | % | Both Male and Female | Adult | Oakland Airport | 18 birds | Exposure Factor Datasets | |
| Time of Nesting | April - June | Both Male and Female | Adult | Oakland Airport | 18 birds | Exposure Factor Datasets | |||
| Time of Fledging or Metamorphosis | September | period by which fledging is complete | Both Male and Female | Adult | Oakland Airport | 18 birds | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Population Density | nesting density based on nearest-neighbor test | 0.12-0.15 | pairs/km2 | Both Male and Female | Adult | Mapimf Biosphere Reserve, Durango (1,000-1,350 m) | 23-29 pairs | Exposure Factor Datasets | |
| Fledging or Weaning Rate | 1.91 | 1.63-2.19 | fledglings/successful nest | Both Male and Female | Adult | Mapimf Biosphere Reserve, Durango (1,000-1,350 m) | 52 nests | Exposure Factor Datasets | |
| Hatching Success | 61 | proportion of pairs that successfully raised at least one young | 55-65 | % | Both Male and Female | Adult | Mapimf Biosphere Reserve, Durango (1,000-1,350 m) | 52 nests | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Hatching Success | reproductive success rate among pairs | 40-54 | % | Both Male and Female | Adult | Dade and Broward counties | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Hatching Success | 73 | percent of pairs hatching at least one chick | % | Both Male and Female | Adult | Moffett Air Force Base | 15 pairs | Exposure Factor Datasets |
| Clutch or Litter Size | 2.5 | mean number of chicks per nest | chicks/nest | Both Male and Female | Adult | Moffett Air Force Base | 11 pairs | Exposure Factor Datasets |
