Images

Osprey on nesting platform in Harris Creek, Maryland photographed as part of a study on fish consumption and reproductive success

This photo shows flow over a conventional fish ladder entrance, using a weir at the downstream end of the channel to constrict flow and create the attraction jet. PIT tagged river herring can be seen swimming in the approach area to the entrance.

This photo shows PIT tagged river herring in the 10 ft wide flume at Conte following the end of a trial as we were draining the flume at the S.O. Conte Research Laboratory Fish Passage Complex.

This photo shows the dam and fish ladder where we collected the river herring in Old Lyme, CT. 

This photo shows river herring schooling inside a 6 ft wide holding tank at outside the S.O. Conte Research Laboratory in the days leading up to the trial.

Riley Mummah is a Mendenhall postdoctoral research fellow with the Eastern Ecological Science Center of the USGS

Jaime is a Research Biologist with the Eastern Ecological Science Center at the Patuxent Research Refuge in Laurel, MD.

Stomach contents from a blue catfish (Ictalurus furcatus) caught in the Potomac River near Nanjemoy, Maryland in March 2024.  The contents of a blue catfish's stomach often include a variety of clams, crabs, mussels and fish.

Mitten crabs (Eriocheir sinensis) are medium-sized crabs with mitten-like claws. They live in freshwater but need saltwater to reproduce.

Composite image showing five life stages of a Long-tailed duck, from hatch to subadult.

Candling (the process of using light to help determine the quality of an egg) of a grey catbird egg to determine viability.

Dr. Dave Kazyak prepares to release an adult Atlantic Sturgeon prior to release as part of a collaborative research effort.

As part of a collaborative study, Dr. Shannon White (USGS EESC) works with partners from the University of Delaware and Delaware State University to count endangered Atlantic sturgeon in the Delaware River using side-scan sonar.

Long-tailed duck diving for underwater hearing testing in an experimental chamber in which the birds’ diving behavior can be studied under various environmental conditions. 

Dr. Shannon Smith and Dr. Dave Kazyak hold a large Atlantic sturgeon prior to release in the Hudson River.

A bird biologist holds a ruby-throated hummingbird in the hand. 

Bird Banding Chief Tony Celis shows a small banded bird to a young member of the Paterson Audubon Society during a visit to the Fall Banding Station. 

 Brennan and Emily collect and transfer salmon plasma to assess for PFAS                

Dr. John Davidson (right) provides instruction on salmon internal anatomy.
 

Brennan and Emily conducting fish habitat surveys in Catoctin Mountain Park.
 

AFS Hutton Scholars Brennan Landerkin (left) and Emily Hunt (right) observing a tank of Atlantic Salmon (Salmo salar) at the Conservation Fund’s Freshwater Institute.