black-tailed deer vs burro deer

black-tailed deer and burro deer both are nouns.

Word	Noun	Adjective	Verb	Adverb
black-tailed deer	Yes	No	No	No
burro deer	Yes	No	No	No

As nouns, burro deer is a hypernym of black-tailed deer; that is, burro deer is a word with a broader meaning than black-tailed deer:

black-tailed deer: mule deer of western Rocky Mountains
burro deer: long-eared deer of western North America with two-pronged antlers

Other hypernyms of black-tailed deer include mule deer, Odocoileus hemionus.

black-tailed deer (noun)	burro deer (noun)
mule deer of western Rocky Mountains	long-eared deer of western North America with two-pronged antlers