A time-lapse video of the coffee-bean snail, Melampus bidnetatus in the Plum Island Estuary in the Great Marsh in Rowley, Massachusetts. Taken in mid-July. You can see the snails flood into a foodpath and climb the stems at night. Why do they climb the stems? Food? Predators? We're not sure.
Time-lapse by David Johnson. Video created by Bethany Williams.