Other signature species are American alligator, bobcat, yellow rail, and purple gallinule. Purple gallinule and least bittern also breed on the lake. The purple gallinule is a rail species, placing it into the family Rallidae. Purple gallinule is an alternative name for two species of birds in the rail family. The purple gallinule ("Porphyrio martinicus") is a swamphen in the genus "Porphyrio".