Learn the life histories of some of Florida’s most beloved marine creatures and what can be done to keep them safe during the nesting season. 2 to 4 p.m. Free; advance registration required. Weedon Island Preserve, 1800 Weedon Drive NE, St. Petersburg. (727) 453-6500; www.weedonislandpreserve.org. As a winter special, Weedon Island Preserve Cultural and Natural History Center will be open from 9 a.m. to 4 p.m. each Wednesday in March and April 2013, in addition to Thursday, Friday and Saturday.