The Greenfield Conservation Commission will host a presentation by loon expert John “The Loonman” Rockwood on Thursday, March 27, at 7 p.m. at the Stephenson Memorial Library, 761 Forest Road, Greenfield.

Rockwood will present a narrated multimedia program following a pair of loon twins from hatching to their ocean migration six months later. The presentation offers an in-depth look at the behaviors and life cycle of the common loon.

The event is free and open to the public. For information, send email to concom@greenfield-nh.gov or call 603-547-5606.