Southwestern Willow Flycatcher (Empidonax traillii ssp. extimus)
Southwestern Willow Flycatcher (Empidonax traillii ssp. extimus)
| Exposure Endpoint Type | Endpoint Value | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|
| Time of Migration or Dispersal | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Time of Nesting | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Home Range | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Territory Size | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Clutch or Litter Size | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Duration of Incubation or Gestation | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Clutches or Litters per year | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Time of Fledging or Metamorphosis | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Time of Hatching or Parturition | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | |
| Time of Mating/ Laying | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|---|
| Population Density | population density in a 360 km riparian corridor as indicated by song counts | singing males/yr | Male | Adult | 6 sampling yrs | Colorado River, Grand Canyon National Park | Exposure Factor Datasets | |
| Population Density | population density in a 360 km riparian corridor as indicated by active nest counts | nests found/yr | Both Male and Female | Adult | 6 sampling yrs | Colorado River, Grand Canyon National Park | Exposure Factor Datasets | |
| Time of Nesting | June 2-July 10 | estimated length of breeding season (period when eggs or young are in the nest) | Both Male and Female | Adult | 6 sampling yrs | Colorado River, Grand Canyon National Park | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Time of Nesting | June 1 | estimated beginning of nesting based on historic egg collections | Both Male and Female | Adult | 187 dated egg sets | coastal southern CA; Colorado River; upper San Pedro River, AZ | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | 12.73 | mean body weight of extimus subspecies | g | Not Reported | Adult | 34 captures | Rio Grand Nature Center (35deg07'N, 106deg41'W); Bosque del Apache National Wildlife Refuge (33deg48'N, 106deg52'W) | Exposure Factor Datasets | 1.16 SD |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Territory Size | 0.10 | breeding territory size | ha | Both Male and Female | Adult | 7 pairs | Colorado River | Exposure Factor Datasets | 0.05 SD |
| Territory Size | 0.5 | territory size of unpaired male | ha | Male | Adult | 1 | Colorado River | Exposure Factor Datasets | |
| Fledging or Weaning Rate | 18% | percent of nests that fledged at least one young | % | Both Male and Female | Both Adults and Juveniles | 17 nest attempts (in 5 sample years) | Colorado River | Exposure Factor Datasets | |
| Clutch or Litter Size | 3 | mean clutch size | eggs/nest | Female | Adult | 3 nests | Colorado River | Exposure Factor Datasets | |
| Time of Mating/ Laying | May 30 (onset) | date when first eggs found | Female | Adult | 17 nest attempts (in 5 sample years) | Colorado River | Exposure Factor Datasets | ||
| Time of Fledging or Metamorphosis | June 29 (earliest fledging) - July 13 (latest fledging) | dates of earlies and latest recording fledging | Both Male and Female | Fledgling | 17 nest attempts (in 5 sample years) | Colorado River | Exposure Factor Datasets |
