The Conception Bank silver boa, Conception Bank boa, or silver boa (Chilabothrus argentum ) is a species of boa described in May 2016 by a team of researchers from Harvard University. It is only known from the Conception Island Bank in the Bahamas. It is the first known discovery of a West Indian boa species in 73 years. It is named for its unique silver color and the fact that the first specimen was found in a silver palm.
Conception Bank silver boa has silver to tan dorsal background coloration, with or without scattered dark brown scales. Ventral scales are pure cream-white. They measure 88–103 cm (35–41 in) in snout–vent length and weigh 182–258 g (6.4–9.1 oz). Tail length varies between 18 and 21 cm (7.1 and 8.3 in).
