Representatives of the genus Cervus are able to hybridize with the formation of intermediate forms that can reproduce between themselves. An example of this is the Askanian deer, which has absorbed the morphological and biological qualities of the founders, but has a unique and stable ecotype. This is a demonstration of the possible sympatric formation of some of the modern cervids. According to external and craniological parameters and the ability of their offspring to breed, the red deer of hybrid origin from the Askania-Nova Biosphere Reserve can be given a subspecies status Cervus elaphus falz-feini.