Patuxent Wildlife Research Center


Patuxent Wildlife Research Center (PWRC) produces innovative science to support natural resource management and meet our nation’s most pressing conservation challenges.
PWRC research topics include bird population dynamics, ecotoxicology, and the development of quantitative & decision analysis tools. We conduct several national programs, including the Bird Banding Lab and the Breeding Bird Survey.

Research Spotlight

Research Spotlight

USGS Patuxent scientists are providing managers with tools for improving detection and for proactively mitigating the impacts of amphibian diseases.

More info

Publication Spotlight

Publication Spotlight

A decision-support framework was developed in collaboration with USFWS to identify approaches to maximize salt marsh management benefits at Bombay Hook National Wildlife Refuge.

Read Publication


Date published: July 23, 2019

Brilliant Bandings & Superb Sightings: Ring-billed Gull in Long Island

A color-marked Ring-billed Gull has second sighting in a Long Island village.

Date published: June 14, 2019

Modeling Management Actions Helps Researchers Pinpoint the Main Culprit of Wood Frog Declines

Amphibian decline is a global conservation crisis driven by multiple interacting stressors, which often act at a local scale with global implications.

Date published: May 31, 2019

Student Interns with Differing Abilities Recognized for Accomplishments in Employment Training

USGS student interns and employees of the Band-Scan Project reflect on their work experiences during their time in STEP-UP.


Publication Thumbnail
Year Published: 2019

Estimating spatially and temporally complex range dynamics when detection is imperfect

Species distributions are determined by the interaction of multiple biotic and abiotic factors, which produces complex spatial and temporal patterns of occurrence. As habitats and climate change due to anthropogenic activities, there is a need to develop species distribution models that can quantify these complex range dynamics. In this paper, we...

Rushing, Clark S.; Royle, J. Andrew; Ziolkowski, David; Pardieck, Keith L.

Publication Thumbnail
Year Published: 2019

Residency, recruitment, and stopover duration of hatch-year Roseate Terns (Sterna dougallii) during the pre-migratory staging period

Avian migratory stopover and staging sites represent important energetic bottlenecks and may influence population dynamics as much as breeding or wintering periods. Roseate terns (Sterna dougallii) are an ideal species to examine staging demography because >70% of the entire endangered northwest Atlantic population stages at accessible...

Davis, Kayla L.; Karpanty, Sarah M.; Spendelow, Jeffrey A.; Cohen, Jonathan B.; Althouse, Melissa A.; Parsons, Katharine C; Luttazi, Cristin F.; Catlin, Daniel H.; Gibson, Daniel

Publication Thumbnail
Year Published: 2019

Eviction notice: Observation of a Common Tern (Sterna hirundo) usurping an active Least Tern (Sternula antillarum) Nest

Although nest usurpation is common in some species and orders of birds, usurpation has rarely been reported for Sterninae. We observed a Sterna hirundo (Common Tern) egg in an active Sternula antillarum(Least Tern) nest with a complete clutch in a mixed-species Sterninae colony in Chesapeake Bay, MD, in May 2018. Based on...

Riggs, Georgia J.; Sullivan, Jeffery D.; Harvey, Kayla M.; Pappas, Dimitri A.; Wall, Jennifer L.; McGowan, Peter C.; Callahan, Carl R.; Koppie, Craig A.; Prosser, Diann