Montana Field Guide

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Montana Field Guides

Home - Other Field Guides
- Kingdom - Animals - Animalia
  - Phylum - Vertebrates - Craniata
    - Class - Birds - Aves
      - Order - Shorebirds - Charadriiformes
        
        Family - Gulls / Terns - Laridae
        
        Species - Heermann's Gull - Larus heermanni

Heermann's Gull - Larus heermanni

Native Species
Accidental Species

Global Rank: G4
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
PIF:

External Links

General Description

About 95% of the global Heermann’s Gull population breed on Isla Rasa, a tiny 142 acre Island in the Gulf of California. The nonbreeding range of this species is along the Pacific Coast from southern British Columbia to Guatamala (Islam and Velarde 2020).

Heermann’s Gull is accidental in Montana. The species was first detected in the state in 2018.

Observations in Montana Natural Heritage Program Database

Number of Observations: 2

(Click on the following maps and charts to see full sized version) Map Help and Descriptions

Relative Density

Recency

SUMMER (Feb 16 - Dec 14)

Direct Evidence of Breeding

Indirect Evidence of Breeding

No Evidence of Breeding

WINTER (Dec 15 - Feb 15)

Regularly Observed

Not Regularly Observed

(Observations spanning multiple months or years are excluded from time charts)

References

Literature Cited AboveLegend: View Online Publication
- Islam, K. and E. Velarde (2020). Heermann's Gull (Larus heermanni), version 2.0. In Birds of the World (P. G. Rodewald and B. K. Keeney, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. Accessed 6 November 2020. https://doi-org.weblib.lib.umt.edu:2443/10.2173/bow.heegul.02
Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Hays, R., R.L. Eng, and C.V. Davis (preparers). 1984. A list of Montana birds. Helena, MT: MT Dept. of Fish, Wildlife & Parks.
- Joslin, Gayle, and Heidi B. Youmans. 1999. Effects of recreation on Rocky Mountain wildlife: a review for Montana. [Montana]: Montana Chapter of the Wildlife Society.
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Dragonflies / Damselflies

Ferns and allies

Conifers

Flowering Plants (Dicots)

Flowering Plants (Monocots)

Citation for data on this website:
Heermann's Gull — Larus heermanni. Montana Field Guide. Montana Natural Heritage Program and Montana Fish, Wildlife and Parks. Retrieved on April 20, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=ABNNM03060