Loggerhead Shrike (Lanius ludovicianus)
Loggerhead Shrike (Lanius ludovicianus)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|---|
| Duration of Incubation or Gestation | 16 | incubation period | d | Not Reported | Embryo | 330 hatched eggs | Pawnee National Grassland | Exposure Factor Datasets |
| Age at Fledging, Metamorphosis, Weaning | 17 | normal fledging period | d | Not Reported | Fledgling | 232 fledged birds | Pawnee National Grassland | Exposure Factor Datasets |
| Fledging or Weaning Rate | 5.40 | average number of fledglings produced per nest | fledglings/nest | Not Reported | Fledgling | 65 successful nests | Pawnee National Grassland | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|---|
| Survival/ Mortality | 46 | calculated probability of survival of any nest from incubation onset to end of fledging | % | Not Reported | Fledgling | 109 nests | Lawton, Comanche County | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | 33.0 | mean body weight of 10 day old nestlings | g | Not Reported | Nestling | 18 nestlings | Archbold Biological Station, Highlands County | Exposure Factor Datasets | 2.6 SD |
| Clutches or Litters per year | number of clutches laid per season per pair | clutches/pair | Both Male and Female | Adult | 10 pairs | Archbold Biological Station, Highlands County | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Location | Type | Countries |
|---|---|---|---|---|
| Age at Sexual Maturity | review | Exposure Factor Datasets | CANADA, USA | |
| Hatching Success | review | Exposure Factor Datasets | CANADA, USA | |
| Fledging or Weaning Rate | review | Exposure Factor Datasets | CANADA, USA |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Survival/ Mortality | 73.0 | estimated probability of a nestling surviving to fledge in pasture areas | % | Not Reported | Nestling | 25 clutches | Archbold Biological Station | Exposure Factor Datasets | 28.8 SD |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Clutches or Litters per year | clutches/yr | Both Male and Female | Adult | 48 pairs | southern Minnesota | Exposure Factor Datasets | |||
| Clutch or Litter Size | 5.65 | average clutch size, 2 years | eggs/clutch | Female | Adult | 46 clutches | southern Minnesota | Exposure Factor Datasets | 1.17 SD |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 5.3 | mean clutch size, 2 years | eggs/clutch | Female | Adult | 20 nests | York County | Exposure Factor Datasets | 0.6 SD |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Territory Size | 8.35 | mean territory size in pasture habitat | ha | Both Male and Female | Adult | 6 territories | Archbold Biological Station near Lake Placid | Exposure Factor Datasets | 0.66 SD |
San Clemente Loggerhead Shrike (Lanius ludovicianus ssp. mearnsi)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|---|
| Dietary Composition | Mollusca (0.00), Crustacea (0.27), Arachnida (0.14), Insecta (14.77), Reptilia (53.29), Mammalia (27.66), Aves (3.86) | percent of total prey found in pellets by biomass | % | Not Reported | Not Reported | 1238 pellets | San Clemente Island | Exposure Factor Datasets |
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