Hall, in 1968 determines that Peromyscus furvus is a monotypic species, being P. latirostris and P. angustirostris synonymies of the first one, although him indicates that there is certain variation grade inside the species. In later works, where the situation of the species is analyzed starting from aloenzimas (Harris and...
In early 1900 the populations of Mexican Wolf began the decline of their populations. Their drastic decline was due to indiscriminate hunting to which were subjected by farmers. By mid-l900 Arizona, New Mexico and Texas will be free of wolves. In the early 1980s created a joint interest by governments...