While much of the property lies underwater, this park contains 2,900 acres of magnificent mangrove swamps, hardwood hammocks, rivers, springs and coastal rocky areas. Birders will find three short walking trails and the coastal areas of interest for the variety of species they offer, including Gray Kingbirds, Short-tailed Hawks and such Keys specialties as Mangrove Cuckoo, Black-whiskered Vireo and White-crowned Pigeon. Walk or bike around the park, or put in a canoe from the boat launch for a different type of birding experience. Glass bottom boat tours of the reef can be good for pelagic species such as Northern Gannets, petrels and Sooty Terns. Be sure to ask about recent sightings at the visitor center, because this park has a propensity for attracting tropical vagrants, including Bahama Mockingbird and Thick-billed Vireo.