Images

Screenshot of EcoSHEDS home page, a USGS web application. EcoSHEDS is a collection of Spatial Hydro-Ecological Data Systems (SHEDS) designed to improve our understanding of stream ecosystems.

Toads (Anaxyrus sp.) lay their eggs in long thin strands, which helps distinguish them from other anuran species which may lay their eggs singly or in round clusters.

Biologists search for Red Knots on the mudflats at Gray's Harbor and decide where to set the nets. Photo credit: Zak Pohlenm, USFWS

These are the eggs of the southern leopard frog (Lithobates sphenocephalus). Leopard frog eggs are laid in tight clusters, and they have contrasting colors of black on the upper side and white on the underside.

EESC facilities and Fish Passage Design & Analysis team members constructed wooden Denil fishway baffles for the 2023 D-Cylinder study in Conte's Fish Passage Complex

Blotchy bass syndrome (BBS) is the presence of hyperpigmentation (melanosis) on the external surface of black basses. This condition has received increased attention from anglers and resource managers in recent years and is a popular topic of discussion and reporting on angling websites and blogging platforms.

A biologist installs a passive integrated transponder (PIT) tag into a brook trout

A biologist measures the length of a brook trout as part of a study on environmental DNA (eDNA).

Biologist prepare brook trout for a study of environmental DNA (eDNA)          

Biologists photograph brook trout as part of a study on environmental DNA (eDNA)

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 

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.

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.

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.