Southwestern Willow Flycatcher (Empidonax traillii extimus) Surveys and Nest Monitoring in San Diego County, California, 2015-2016

Dates

Publication Date: 2022-09-13
Start Date: 2015-05-15
End Date: 2016-07-31

Citation

Howell, S.L., and Kus, B.E., 2022, Southwestern willow flycatcher (Empidonax traillii extimus) surveys and nest monitoring in San Diego County, California (ver. 3.0, January 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P96VC5Y4.

Summary

Data presented are results of surveys (2015 and 2016) and monitoring (2016) for Southwestern Willow Flycatcher (Empidonax traillii extimus) in San Diego County, California. In 2015, surveys were conducted at select locations along the San Luis Rey River between College Boulevard and Lake Henshaw. In 2016, surveys were conducted at select locations along Agua Hedionda Creek, San Dieguito River, San Luis Rey River, Santa Ysabel Creek, and San Diego River, and nest monitoring was performed at three locations along the San Luis Rey River downstream of Lake Henshaw (Cleveland National Forest, Rey River Ranch, Vista Irrigation District). Surveys were conducted along multiple sections of the river where permission to access properties could [...]

Summary

Data presented are results of surveys (2015 and 2016) and monitoring (2016) for Southwestern Willow Flycatcher (Empidonax traillii extimus) in San Diego County, California. In 2015, surveys were conducted at select locations along the San Luis Rey River between College Boulevard and Lake Henshaw. In 2016, surveys were conducted at select locations along Agua Hedionda Creek, San Dieguito River, San Luis Rey River, Santa Ysabel Creek, and San Diego River, and nest monitoring was performed at three locations along the San Luis Rey River downstream of Lake Henshaw (Cleveland National Forest, Rey River Ranch, Vista Irrigation District). Surveys were conducted along multiple sections of the river where permission to access properties could be obtained. Locations were surveyed using a standardized protocol three to four times between 15 May and 31 July. The number, age (adult or juvenile), sex, banding status (color banded or not, and if so, color combination), and breeding status (paired, undetermined, or transient) of all willow flycatchers was recorded. In 2015, as preparation for nest monitoring in 2016, adult flycatchers (when possible) were captured in mist nets, using song playbacks to attract birds to nets, and color banded with individually unique color combinations to provide data on survival within and between years. Nestlings in nests found opportunistically during surveys were banded at 6-8 days of age. During banding, data were collected on age, sex, weight, and reproductive status. The goal of nest monitoring was to collect data on annual productivity. Monitored territories were visited 1-2 times weekly to determine nest success and band the nestlings at 6-8 days of age. Adults were also color banded as described above to examine survivorship and dispersal patterns.

Contacts

Point of Contact :: U.S. Geological Survey, Western Ecological Research Center
Originator :: Scarlett L Howell, Barbara E Kus
Metadata Contact :: Barbara E Kus
Distributor :: U.S. Geological Survey - ScienceBase

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Southwestern_Willow_Flycatcher_surveys_and_nest_monitoring_in_San_Diego_County_California_2015-2016.xml Original FGDC Metadata	View	19.04 KB	application/fgdc+xml
2015SurveyArea.csv		1.64 KB	text/csv
Abbreviations_AllYears.csv		937 Bytes	text/csv
ColoredLegBandKey.csv		2.34 KB	text/csv
SWFLAdultBandStatus2015.csv		1.56 KB	text/csv
SWFLAdultBandStatus2016.csv		3.18 KB	text/csv
SWFLNestlingBands2015.csv		407 Bytes	text/csv
SWFLNestlingBands2016.csv		4.18 KB	text/csv
SWFLNestResults2016.csv		4.82 KB	text/csv
TerritoryCrosswalk_AllYears.csv		1.53 KB	text/csv
WIFLIndividualSurvey2015.csv		9.19 KB	text/csv
WIFLIndividualSurvey2016.csv		7.59 KB	text/csv
WIFLLocations2015.csv		6.71 KB	text/csv
WIFLLocations2016.csv		6.43 KB	text/csv
WIFLObservers_AllYears.csv		477 Bytes	text/csv
WIFLSurveyResults2015.csv		1.14 KB	text/csv
WIFLSurveyResults2016.csv		925 Bytes	text/csv
2016SurveyArea.csv		1.25 KB	text/csv
DataDictionary_AllYears.csv		15.99 KB	text/csv

Shapefile: SWFL_SurveyAreas_2015.zip
SWFL_SurveyAreas_2015.sbn		244 Bytes
SWFL_SurveyAreas_2015.sbx		124 Bytes
SWFL_SurveyAreas_2015.shp		9.7 KB
SWFL_SurveyAreas_2015.shx		196 Bytes
SWFL_SurveyAreas_2015.cpg		5 Bytes
SWFL_SurveyAreas_2015.dbf		1.43 KB
SWFL_SurveyAreas_2015.prj		145 Bytes

Shapefile: SWFL_SurveyAreas_2016.zip
SWFL_SurveyAreas_2016.sbn		228 Bytes
SWFL_SurveyAreas_2016.sbx		132 Bytes
SWFL_SurveyAreas_2016.shp		6.78 KB
SWFL_SurveyAreas_2016.shx		172 Bytes
SWFL_SurveyAreas_2016.cpg		5 Bytes
SWFL_SurveyAreas_2016.dbf		1.1 KB
SWFL_SurveyAreas_2016.prj		145 Bytes

Related External Resources

Type: Related Primary Publication

Distribution and abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Upper San Luis Rey River, San Diego County, California—2021 data summary	https://doi.org/10.3133/dr1158
Howell, S.L., and Kus, B.E., 2023, Distribution and abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the upper San Luis Rey River, San Diego County, California—2022 data summary: U.S. Geological Survey Data Report 1173, 12 p., https://doi.org/10.3133/dr1173.	https://doi.org/10.3133/dr1173

Type: Citation

Howell, S.L., Kus, B.E., and Mendia, S.M., 2022, Distribution and demography of Southwestern Willow Flycatchers in San Diego County, 2015–19: U.S. Geological Survey Open-File Report 2022–1082, 43 p., https://doi.org/10.3133/ofr20221082.	https://doi.org/10.3133/ofr20221082

Purpose

The purpose of this study was to determine the size and distribution of Southwestern Willow Flycatcher populations within San Diego County, and to collect demographic data to better understand population trends and conservation needs of flycatchers. This study was part of the San Diego Management and Monitoring Program’s (SDMMP) regional monitoring and management of sensitive species and habitats on conserved lands in western San Diego County. The SDMMP coordinates science-based biological management and monitoring of lands in San Diego that have been conserved through various conservation planning and mitigation efforts. The results of this study will be used by managers to develop specific management goals and objectives to ensure the species’ continued existence in San Diego County.

Southwestern Willow Flycatcher (Empidonax traillii extimus) Surveys and Nest Monitoring in San Diego County, California, 2015-2016

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