Cozumel Harvest Mouse (Reithrodontomys spectabilis) is assessed as Critically Endangered because this species is known only from Cozumel Island, Mexico where it is estimated to exist in small subpopulations (< 50 individuals/subpopulation) with an estimate of less than 200 individuals in the entire population. The species has not recovered from negative impacts from introduced species (Boa constrictor, cats, dogs, and rats), nor the 2005 hurricanes. The population is highly differentiated genetically, and exists in four small subpopulations.

Available at: https://www.iucnredlist.org/species/19416/22386261