Juvenile Speckled Forest Pit Vipers are much grayer than the adults.

This pretty, rather large but slender lancehead of the primary Amazonian Rainforests is seldom seen and therefore poorly understood. The gray to olive green ground color (gray when juvenile, olive when adult) renders this snake all but invisible as it lies quietly coiled amidst the fallen leaves or, seemingly as often, on the mossy or lichenate trunks of fallen trees or forest lianas. Normal adult size is between 3 and 4 feet in length but may occasionally exceed 5 feet. Litter size varies from 2 to more than a dozen in number. Neonates reportedly vary from about 7 inches to 10 inches in length. The grayish color of the neonates provides no less camouflage than the green shades of the adults. At all stages of growth there are prominent darker bands are flecked heavily with the ground color and often terminate ventrolaterally with a light blotch. The iris of the eye is liberally flecked with black.

In bygone years this snake was referred to as Castelnaud’s Viper, Bothrops castelnaudi, and that name is still occasionally used today.

In more than 20 years of periodic Amazonian exploration I have seen only a single example of this species in the wild. But after seeing the remarkable camouflage of that one, I have never ceased to wonder how many unseen examples I’ve brushed by?