Currently, three lizards and one toad are known to inhabit Diego Garcia, and possibly one snake. All are believed to have been introduced by human activity. The house gecko (''Hemidactylus frenatus''), the mourning gecko (''Lepidodactylus lugubris''), the garden lizard (an agamid) (''Calotes versicolor''), and the cane toad (''Bufo marinus''). A viable population of a type of blind snake from the family Typhlopidae may be present, probably the brahminy blind snake (''Ramphotyphlops braminus''). This snake feeds on the larvae, eggs, and pupae of ants and termites, and is about the size of a large earthworm.