Images

Neogale vison, American Mink crossing the Duval bridge at the Patuxent Research Refuge in Laurel, MD

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Dr. Glenn Olsen and Mary Anderson at work doing a surgical procedure to implant a small 1 ounce (30 gram) radio transmitter in a Ring-necked Duck. This procedure is part of a multi-year study looking at wintering Ring-necked Ducks in the southeastern US.

A redhead duck floats on the Choptank River in Cambridge, MD. The redhead is a medium-sized diving duck.

Didelphis virginiana, Virginia Opossum eating the caterpillar of the Giant Leopard Moth, Hypercompe scribonia

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This conceptual diagram explains how the research involved in the NSF PIPP project will be broken down into specific components.

A Lesser Scaup floats on the Choptank River in Cambridge, MD. small North American diving duck that migrates south as far as Central America in winter.

An American wigeon floats on the Choptank River in Cambridge, MD. The American wigeon (Mareca americana), also known as the baldpate, is a species of dabbling duck found in North America

A female canvasback duck spreads her wings whole floating on the water of the Choptank River in Cambridge, MD. Often called the aristocrat of ducks, the Canvasback holds its long sloping forehead high with a distinguished look.

A banded Field Sparrow that was found as part of a bird collision survey at Prudential Tower in Newark, New Jersey in 2020.

A Black-throated Blue Warbler at a stopover site along the Patuxent River.  Photo courtesy of Michael Lutmerding of the EESC at Patuxent Research Refuge in Laurel, MD.

Golden-winged Warbler at a stopover site during fall migration                 

Atlantic Menhaden feeding in the Chesapeake Bay in Chesapeake Beach, MD, USA.. Photo by Mikey Lutmering.

Andy Royle processing a box turtle.

Category: Ecosystems, Field Work, Herps, Research

A pair of box turtles encountered during a survey at the Patuxent Research Refuge in Laurel, MD

Eastern Box Turtle in Inwood, WV. Eastern Box Turtles are common in this region, but are threatened or listed as species of special concern in some New England states.

Blue catfish (Ictalurus furcatus) are an important aquatic invasive species throughout many Chesapeake Bay tributaries.  Scientists from the EESC are working with federal, state, and regional partners to assess the potential impacts of blue catfish on native fauna and important fisheries resources throughout the region.

Field staff are establishing a permanent transect to measure changes in trail conditions along this trail.  A self-leveling laser was used to set up the transect and the diagram illustrates how vertical measurements are collected to compute cross-sectional area soil loss measures.  

Boulder Field of Hickory Run State Park in Pennsylvania, taken in 2020 by Andrea Ostroff.        

As part of a fish health assessment, Heather Walsh is performing a necropsy on a young of the year smallmouth bass from the Susquehanna River.  Previously, young of the year smallmouth bass from the Susquehanna River drainage experienced fish kills and lesions.  This work was conducted to follow-up on the health status of these bass populations.

This is Drew Kellogg, a 2019 USGS summer hire filtering water in Rock Creek Park for eDNA analyses. The eDNA will be screened for the presence of aquatic invertebrates.