Sheepscot Valley Conservation Association will host a search along the trails of the Marsh River Preserve at 10 a.m. Thursday, March 26, to find evidence that spring is truly around the corner.

Lynne Flaccus, the association’s program manager and naturalist, will lead participants along the trails to the marsh exploring the early signs of spring and sharing information about ways citizen scientists can become involved in documenting seasonal changes or phenology — periodic biological phenomena (such as bird migration or plant flowering) that are correlated with climatic conditions, according to the news release from the association.

The 70-acre Marsh River Preserve off Osprey Point Road in Newcastle includes upland forest, including 5,500 feet of frontage on Marsh River and a large area of salt marsh north of U.S. Route 1. For more information, visit sheepscot.org or call the office at 586-5616.