IT’S BIG NIGHT. Saturday, April 5, walks at 6, 6:10, 6:20, 6:30, 6:40 and 6:50 p.m., Ipswich River Wildlife Sanctuary, 87 Perkins Row, Topsfield. As wood frogs and mole salamanders migrate to vernal pools where they breed, take a one-hour guided walk along the Vernal Pool Trail and meet interesting characters who will share facts and stories about themselves, vernal pools and this time of year. Upon return, refreshments and other surprises await in the barn. Rain or shine. Dress for weather and wear warm foot gear. Open to families with children ages 4 and older. $7/members, $9/nonmembers. Preregistration required at 978-887-9264 or www.massaudubon.org/ipswichriver.
VERNAL POOL SPRING HIKE. Sunday, April 6, 1 to 4 p.m., meet at entrance to gated path around Middleton Pond on Lake Street, Middleton. Middleton Stream Team’s annual spring hike to vernal pools and other water bodies to see what animals might have come forth as the ice melts. Bring a camera; a light, long-handled net; and a white plastic bowl to catch and observe small creatures. Visit www.MiddletonStreamTeam.org the morning of for possible weather changes. MSTMiddletonMA@gmail.com, 978-777-4584.
FLY-FISHING WORKSHOP. Tuesday, April 8, 7 to 8:30 p.m., Hamilton-Wenham Public Library, 14 Union St., South Hamilton. Capts. Derek Spingler and Nat Moody teach and demonstrate the fundamentals of fresh and salt water fly-fishing and casting. Time for attendees to try casting. Topics covered include fly rod selection, reels, lines, fly selection for salt and fresh, knot-tying and leader designs. Space is limited; registration is required at 978-468-5577 or email@example.com. Funded by the Friends.
AMERICA’S CIVIL RIGHTS STRUGGLE: FILM FORUM. Thursday, April 3, 6:30 to 8:30 p.m., Salem Five Community Room, 210 Essex St., Salem. Salem State University presents “Created Equal: America’s Civil Rights Struggle,” a series of film forums that illustrate the history of civil rights in America to raise the level of discourse on the legacy of slavery and emancipation. Screening of “The Loving Story” and discussion of loving and interracial relationships with Renée M. Landers, professor of law at Suffolk University Law School. Free. 978-542-7349, salemstate.edu/created_equal.