Large schools of fish enter grass beds in search of peelers. Porpoises enter the Bay to feed on returning fish, especially croakers and spot.
Warblers arrive after wintering in Central America.
Horseshoe crabs spawn in late May or early June. Adult rockfish, herring, and shad head back to the ocean after spawning in northern Bay rivers. At the end of the month, sooks begin to release their eggs near the mouth of the Bay. Fawns and red fox kits are born. The longer photoperiod means more sunlight for green plants to convert to food energy by photosynthesis.