A demonstration is planned at the town’s Pine Creek Open Space property Thursday by the Connecticut Audubon Society.

The event will take place at 9 a.m. at the property off Old Dam Road. There is a $7 fee. (Rain date is Oct. 20.)

Judy Richardson, a “master bird bander,” and her team will check the resident and migratory birds near Long Island Sound caught in mist nets, and tag them with numbered bands for study and research.

Birds captured in the nets are measured, weighed and checked for sex and age before they are released unharned back into the wild. If one of the banded birds is recovered in the future, either dead or alive, the information is recorded and data sent to the bander and the Audubon Bird Banding Laboratory.

The Connecticut Audubon Society has operated a bird-banding station at the Birdcraft Sanctuary on Unquowa Road since the 1970s. Volunteers, licensed by the U.S. Fish and Wildlife Service, have documented more than 18,000 birds at the site.

Call the Connecticut Audubon Society Center at Fairfield for reservations or directions at 203-259-6305, ext. 109.