The work of naturalist Mark Brown will be on display through June 2 at Mass Audubon’s Joppa Flats Education Center, 1 Plum Island Turnpike. Brown’s photography exhibit, “Still of the Moment: Images of the Natural World,” is showing in the Juliet Kellogg French room during the center’s regular hours, Tuesday through Sunday and Monday holidays from 8:30 a.m. to 4 p.m. The exhibit features Brown’s latest imagery, including his current project on North American owls. A portion of all purchases made during the exhibit will help support Mass Audubon’s Joppa Flats. To learn more about the exhibit, visit Brown’s website at www.stillofthemoment.com or contact the Joppa Flats Education Center at 978-462-9998.