Images

Preparing test diet to determine the toxicity of rodenticide to non-target predatory birds in a effort to mitigate risk

Alex Haro standing next to the USGS table display the AFS SNE Chapter Meeting 

Monthly realizations of the spatial random field for the continental United States, with brighter colors indicating locations within a month with relatively greater avian influenza virus prevalence. Originally published in Kent et al.

Percentage of individuals predicted to test positive for avian influenza virus (± 95% CI) for each species for each week ignoring spatial effects. Predictions are based on the overall prevalence values in the USDA dataset, which had a higher detection rate. Circles running along the x-axis indicate the number of samples for each species taken during that week.

Canada Geese using a small retention pond near a commercial poultry facility.           

Beautiful, early morning sunrise of a reservoir located at the Fish Health Lab in Kearneysville, WV.  This photo was taken during a bird walk to participate in the nationwide Christmas Bird Count conducted by eBird.

Diagram depicting the sources of drinking water (surface water and groundwater), known and potential sources of contaminants introduced to drinking water (urban and agricultural land use, runoff, infiltration, waste, and wastewater sources) and routes of potential exposure from the point of use (drinking water in the home, at work, and from bottled water). 

A steel support structure for the upcoming 2023 D-Cylinder fish ladder study installed in the East Flume of the Conte Research Lab's Fish Passage Complex by USGS employees Rolando (Marty) Garcia and Aaron Heisey.

See that one white feather? This white-throated sparrow is displaying leucism, in which there is partial loss of pigmentation. 

A Recaptured Northern Saw-whet Owl at the Willistown Conservation Trust, Banding station at Rushton Woods Preserve, Pennsylvania. This owl is being held safely in the "banders grip" by BBL Biologist, Stephanie Egger. This owl was originally banded in Thunder Bay Ontario.

A Recaptured Northern Saw-whet Owl at the Willistown Conservation Trust, Banding station at Rushton Woods Preserve, Pennsylvania. This owl was originally banded in Thunder Bay Ontario.

Nukuhou coastal wetland. A tidal wetland with grey mangroves (Avicennia marina) and salt marsh threatened by sea level rise. At Ohiwa Harbor, North Island, New Zealand.

Scientists examine the tail of a Fox Sparrow for growth bars. Growth bars are faint lines in the tail which illustrate the normal growth of feathers, typically forming every 24 hours as the feather grows.

Fox Sparrows are the largest species of sparrow caught at the Fall Migration Station at Patuxent Research Refuge. 

Spring migration departure date (a–e) and duration of first stopover (f–j) by species and infection status across 84 individuals with paired influenza and telemetry data. Partially transparent points show raw data; large points and error bars show means and 95% confidence intervals estimated from linear models.

Purple Finch banded at Patuxent Research Refuge mist netting under the powerlines.

A Field Sparrow banded at the Fall Migration Station at Patuxent Research Refuge. 

image of the automated prep station for the Nanostring nCounter Max. The device prepares cartridges for CodeSet Gene Expression Analysis

Nonlethal smallmouth bass sampling is being done to address health concerns and population declines that may be associated with polyfluoroalkyl substances (PFAS) in the upper Potomac River.  As part of our nonlethal sampling methods, blood/plasma can be analyzed for PFAS in smallmouth bass.

Nonlethal smallmouth bass sampling is being done to address health concerns and population declines that may be associated with polyfluoroalkyl substances (PFAS) in the upper Potomac River.

American Redstarts have rictal bristles, stiff feathers around the bill, that are believed to help assist in catching insects during flight.