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Analysis of biological tissues or direct sources of food may better characterize exposure of non-target organisms to current-use pesticides. Food boluses were collected from tree swallow (Tachycineta bicolor) nestlings using a non-lethal, ligature method and were composited based on nest. The ligatures, which prevented the bolus from being swallowed, were placed on nestlings for 1 h until samples were collected. Samples in 2016 were collected from nestlings at 6 days and 12 days post-hatch whereas 2018 samples were collected from nestlings at 12 days post-hatch. Furthermore, in 2016 and 2018, insects commonly consumed by tree swallows were collected via sweep net and composited based on suborder (Brachycera, Nematocera,...
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This database contains records of grassland bird abundance and vegetation structure on tallgrass and mixed-grass prairies managed by the U.S. Fish and Wildlife Service (USFWS). Specifically, under the adaptive-management decision framework (Native Prairie Adaptive Management [NPAM] intiative), we surveyed breeding birds and sampled vegetation on 89 native prairie NPAM units managed by the U.S. Fish and Wildlife Service, including 55 units in 2011, 87 units in 2012, and 87 units in 2013. The NPAM units occurred in 19 USFWS refuge complexes and wetland management districts, including 14 complexes in USFWS Region 6 (North Dakota, South Dakota, and Montana) and five complexes in USFWS Region 3 (Minnesota).
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Shallow subsurface electrical conductivity was mapped at Hansen National Wildlife Refuge (NWR) in northeast Montana using the DUALEM421 electromagnetic sensor (Dualem, Inc., ON, Canada) in the winter of 2017. Data were acquired by towing the DUALEM421 sensor on a sled behind an all-terrain vehicle or snow machine, with the sensor at a nominal height of 0.3 meters (m) above ground surface. Approximately 10 line-kilometers (km) of data were acquired over an area of approximately .2 square-kilometers. Data were manually edited to remove sensor dropouts, lag corrected for apparent offsets between recorded GPS location and data locations for each coil pair, and averaged to a sounding distance of 1m along the survey path;...
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Shallow subsurface electrical conductivity was mapped at Gjesdal East National Wildlife Refuge (NWR) in northeast Montana using the DUALEM421 electromagnetic sensor (Dualem, Inc., ON, Canada) in the winter of 2017. Data were acquired by towing the DUALEM421 sensor on a sled behind an all-terrain vehicle or snow machine, with the sensor at a nominal height of 0.3 meters (m) above ground surface. Approximately 13 line-kilometers (km) of data were acquired over an area of approximately .7 square-kilometers. Data were manually edited to remove sensor dropouts, lag corrected for apparent offsets between recorded GPS location and data locations for each coil pair, and averaged to a sounding distance of 1m along the survey...
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Note: this data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P9YKWWSZ This dataset contains discrete groundwater elevation measurements for wells in the Cottonwood Lake Study Area, Stutsman County, North Dakota.


map background search result map search result map Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T4 from 1982 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T5 from 1982 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T8 from 1982 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P1 from 1985 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T5 from 1986 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P6 from 18 July 1990 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P8 from 10 August 1992 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P2 from 26 July 1996 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P7 from 2006 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T1 from 2014 Cottonwood Lake Study Area-Wetland Vegetation Zones-1975 Cottonwood Lake Study Area-Wetland Vegetation Zones-1979 Cottonwood Lake Study Area-Wetland Vegetation Zones-1988 Cottonwood Lake Study Area-Wetland Vegetation Zones-2000 Cottonwood Lake Study Area-Wetland Vegetation Zones-2009 Cottonwood Lake Study Area - Groundwater Elevations Adaptive management in native grasslands managed by the U.S. Fish and Wildlife Service: Implications for grassland birds, 2011-2013 data release Current-use pesticides in tree swallow (Tachycineta bicolor) prey Gjesdal East NWR, Montana, 2017 Hansen NWR, Montana, 2017 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T4 from 1982 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T5 from 1986 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T5 from 1982 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T8 from 1982 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P1 from 1985 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P8 from 10 August 1992 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T1 from 2014 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P6 from 18 July 1990 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P2 from 26 July 1996 Hansen NWR, Montana, 2017 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P7 from 2006 Cottonwood Lake Study Area-Wetland Vegetation Zones-1975 Cottonwood Lake Study Area-Wetland Vegetation Zones-1979 Gjesdal East NWR, Montana, 2017 Cottonwood Lake Study Area - Groundwater Elevations Cottonwood Lake Study Area-Wetland Vegetation Zones-1988 Cottonwood Lake Study Area-Wetland Vegetation Zones-2000 Cottonwood Lake Study Area-Wetland Vegetation Zones-2009 Adaptive management in native grasslands managed by the U.S. Fish and Wildlife Service: Implications for grassland birds, 2011-2013 data release Current-use pesticides in tree swallow (Tachycineta bicolor) prey