also includes most Caribbean islands. While vast, its range is also patchy as the bat is limited to mostly well-watered lowland and coastal areas as well as river basins. There is geographical variation in the species and are classified as subspecies. Bats around the Caribbean Basin are large and usually have the pale mid-dorsal stripe, despite varying in pelage. These bats are known as N. l. mastivus. In Guianas and the Amazon Basin, the bats are small and dark and often lack the pale mid-dorsal stripe. These bats are known as N. l. leporinus. In eastern Bolivia, southern Brazil and northern Argentina bats tend to be large and pale, more so than the other subspecies. They are known as ''N. l. rufenscenes. Ecology and behavior The greater bulldog bat lives primarily in tropical lowlands. The bats are commonly found over ponds and streams as well as estuaries and coastal lagoons. They live in colonies that number in the hundreds. In Trinidad, bulldog bats rest in hollow trees like silk-cotton, red mangrove and balatá. The bats live in hollow tree roosts in other areas as well. They also roost in deep sea caves. Like most bats, bulldog bats are nocturnal. Female bulldog bats stay together in groups while roosting and tend to be accompanied by a resident male. Females associate with the same individuals in the same location for several years unaffected by changes in resident males and movements of the group to different roosts. A male may stay with a female group for two or more reproductive seasons. Bachelor males are segregated from the females and may roost alone or together in small groups. Female bats forage either alone or with their roost mates, with stable female groups continue to forage in the same areas in the long term. Males forage alone and use areas that are larger and separate from those used by the females. Food and hunting The greater bulldog bat is one of the few bat species that has adapted to eating fish. Nevertheless, the bats eat both fish and insects. During the wet season, the bats feed primarily on insects like moths and beetles. During the dry season, bat will primarily feed on fish as well as crabs, scorpions and shrimp to a lesser extent. The bulldog bat mostly forages for fish during high tide and locates them with echolocation. A bulldog bat will fly high