In my house
Pair found in evening, one active crawling, the other coiled under shrub in rocky area of roadcut at midslope (juniper scrubland/grassy slope with bedrock ledges).
organismo en categoría en peligro de extinción en la lista roja de la IUCN encontrada en la estación biológica de la UMSNH.
especie endémica de México.
Crotalus is a genus of venomous pit vipers found only in the Americas from southern Canada to northern Argentina. The name is derived from the Greek word krotalon, which means "rattle" or "castanet", and refers to the rattle on the end of the tail which makes this group (genera Crotalus and Sistrurus) so distinctive. 32 species are currently recognized.