Mule Deer

Open encyclopedia reference

The mule deer (Odocoileus hemionus) is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer.

Mule deer are found in the western and central parts of North America. Various subspecies range from the western Great Plains to the Rocky Mountains, the southwest United States and northern Mexico, and the west coast of the continent. Their range is smaller than the related white-tailed deer, which are found throughout most of North America east of the Rocky Mountains and in the valleys of the Rocky Mountains from Idaho and Wyoming northward. Mule deer have also been introduced to Argentina and Kauai, Hawaii.

Wikipedia contributors, Mule deer; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T01:40:46.616021+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Odocoileus hemionus (Rafinesque, 1817)

Name authority

(Rafinesque, 1817)

Common name

Mule Deer

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Artiodactyla

Family

Cervidae

Genus

Odocoileus

Extinction status

Recorded extant

Classification family tree

Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.

1. domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
2. kingdomAnimalia
3. phylumChordata
4. subphylumVertebrata
5. infraphylumGnathostomata
6. parvphylumOsteichthyes
7. megaclassTetrapoda
8. classMammalia Linnaeus, 1758
9. subclassTheria Parker & Haswell, 1897
10. infraclassEutheria Gill, 1872
11. orderArtiodactyla Owen, 1848
12. familyCervidae Goldfuss, 1820
13. subfamilyCapreolinae Brookes, 1828
14. tribeOdocoileini Pocock, 1923
15. genusOdocoileus Rafinesque, 1832
16. speciesOdocoileus hemionus (Rafinesque, 1817)

Close classified relatives

These entries share the source’s genus, Odocoileus. They are not necessarily the closest relatives established by molecular evidence.

Browse 50 records assigned to Cervidae.

Names & synonyms

Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.

Documented distribution

Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.

Source literature & publication evidence

References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.

1. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=180698 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references

Origins, evidence & remaining research

Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.

Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record.

Dataset citation & attribution

This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11

Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.

Stable key: col:48NBP. Classification follows source parent identifiers. English common names may vary by region.