Olympic Marmot

Open encyclopedia reference

The Olympic marmot (Marmota olympus) is a rodent in the squirrel family, Sciuridae. It occurs only in the U.S. state of Washington, at the middle elevations of the Olympic Peninsula. The closest relatives of this species are the hoary marmot and the Vancouver Island marmot. In 2009, it was declared the official endemic mammal of Washington state. This marmot is about the size of a domestic cat, typically weighing about 8 kg (18 lb) in summer. The species shows the greatest sexual dimorphism found in marmots, with adult males weighing on average 23% more than females. It can be identified by a wide head, small eyes and ears, stubby legs, and a long, bushy tail. Its sharp, rounded claws aid in digging burrows. The coat color changes with the season and with age, but an adult marmot's coat is brown all over with small white areas for most of the year. The species has a diet consisting mainly of a variety of meadow flora, including dry grasses, which it also uses as bedding in burrows.

Wikipedia contributors, Olympic marmot; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T03:44:41.862290+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Marmota (Petromarmota) olympus (Merriam, 1898)

Name authority

(Merriam, 1898)

Common name

Olympic Marmot

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Rodentia

Family

Sciuridae

Genus

Marmota

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. orderRodentia Bowdich, 1821
12. suborderSciuromorpha Brandt, 1855
13. familySciuridae Fischer de Waldheim, 1817
14. subfamilyXerinae Osborn, 1910
15. tribeMarmotini Pocock, 1923
16. genusMarmota Blumenbach, 1779
17. subgenusPetromarmota Steppan et al., 1999
18. speciesMarmota (Petromarmota) olympus (Merriam, 1898)

Close classified relatives

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

Browse 219 records assigned to Sciuridae.

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=180141 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. A suitable sourced image remains to be added.

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:3Y84H. Classification follows source parent identifiers. English common names may vary by region.