Crotalus durissus unicolor is a venomous pitviper subspecies found only on the Caribbean island of Aruba, off the coast of Venezuela. Critically endangered, it is estimated that fewer than 230 adults survive in the wild. It is sometimes still classified as a distinct species.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0