Steep Rock Association is seeking volunteers to scan sections of the Shepaug River in Washington for bald eagles Jan. 13 from 7 to 11 a.m.

The data collected will be reported to the state Department of Energy and Environmental Protection as the land trust’s contribution to the nationwide survey whose goal is to document trends in bald eagle populations over time.

With such a broad geographic and temporal scope, the project relies on public input and exemplifies the value of citizen science: a method where nonprofessionals perform meaningful science.

Volunteers of all expertise are invited to participate.

Sites will be assigned to volunteers based on ease of access, degree of hiking and time of availability.

Training will be provided Jan. 12 from 4 to 5 p.m. at the association’s office at 2 Green Hill Road.

Protocol, identification/aging of bald eagles, as well as waterfowl identification will be covered.

Interested volunteers who cannot attend the training should call 860-868-9131.

Although the early hours of a winter day may be cold, patience and perseverance are often rewarded with many wildlife sightings. Following the survey, at 11:30 a.m., volunteers should submit their data.

Volunteers should dress warmly and bring a pair of binoculars.

Registration is required by visiting or calling 860-868-9131.

The program leader will be Rory Larson, who has professionally researched several bird species and works to better understand the importance of SRA’s preserves to birds.