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There is only one species, but two subspecies, the northern bald eagle and the southern. There are also several races, but all belong to the same species.
ALP
muslim
Not as a species, but a couple of races are in trouble. See IUCN Redlist.
rabbit
'On the Origin of Species by Means of Natural Selection , or the Preservation of Favoured Races in the Struggle for Life .' - Charles Darwin
No. Different species means that they cannot reproduce (if they can reproduce they would be different races of the same species).
There is only one species, but several races in that species. The Mexican, Brazillian,and Central American to name three.
As a species leopards are not endangered, but some races are. To see endangered races, check the IUCN Redlist.
There are no known "alien races", so the question is more or less meaningless even if "animal characteristics" was defined well enough for us to tell.
When someone refers to an interracial couple means that people of the couple belong to different races. For example, an interracial couple would be a couple formed by a Chinese and an African.
Some races are, as the Florida panther is endangered..