Three of the trails also have 30-foot observation towers. Though wildlife can be seen year-round at Bombay Hook, fall and spring offer the best opportunity for observing peak concentrations of migratory birds. The period from October 1 through November 30 is generally the most interesting to the refuge visitor. This is the season waterfowl populations are at their peak. Over 150,000 ducks and geese utilize the refuge at this time.
Spring is another preferred season for the visiting public.
March is the second peak season for waterfowl as they travel through on their return to northern breeding grounds. April brings early shorebird migrants and the emergence of reptiles and amphibians from winter hibernation. Shorebirds are at their highest concentrations during May and June, primarily due to the arrival of horseshoe crabs laying eggs along the bay shore and mud flats. These eggs provide the shorebirds with needed energy to complete their northward migration. Wading birds such as herons, egrets and glossy ibis reach their peak numbers during the summer months.