Family Dusk Paddle: Owls on the Ipswich River. Mass. Audubon Society Ipswich River Wildlife Sanctuary. 87 Perkins Row. Topsfield. 6:00 p.m. to 8:00 p.m. For families with children 6 years and older. Bring your family and join us for a leisurely paddle in a canoe on the gentle Ipswich River as we learn more about the river and some of its inhabitants. $15/adults, $13/children (discount for Mass Audubon members). Registration required. 978-887-9264. www.massaudubon.org