Montana Field Guide

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Montana Field Guides

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- Kingdom - Animals - Animalia
  - Phylum - Vertebrates - Craniata
    - Class - Birds - Aves
      - Order - Pelicans / Herons / Bitterns / Ibises - Pelecaniformes
        
        Family - Bitterns / Egrets / Herons / Night-Herons - Ardeidae
        
        Species - Great Egret - Ardea alba

Great Egret - Ardea alba

Image Copyright and Usage Information

Native Species

Global Rank: G5
State Rank: SNA

Agency Status
USFWS: MBTA
USFS:
BLM:
PIF:

External Links

General Description

A large wading bird with all-white plumage; long black legs and feet; a long neck; and a long, straight, pointed, yellow bill; in breeding plumage, long white plumes extend from back beyond end of tail; average length 99 cm, wingspan 130 cm.

For a comprehensive review of the conservation status, habitat use, and ecology of this and other Montana bird species, please see Marks et al. 2016, Birds of Montana.

Diagnostic Characteristics

Differs from most other white herons in larger size (averages 23 cm longer than Reddish Egret, 38 cm longer than Snowy Egret), unicolored yellowish bill, and all-black legs and feet. Differs from the white form of the Great Blue Heron in having black legs and feet (versus yellowish).

Species Range

Montana Range Range Descriptions

Migratory

Western Hemisphere Range

Observations in Montana Natural Heritage Program Database

Number of Observations: 215

(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
- Marks, J.S., P. Hendricks, and D. Casey. 2016. Birds of Montana. Arrington, VA. Buteo Books. 659 pages.
Additional ReferencesLegend: View Online Publication
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- American Ornithologists’ Union [AOU]. 1998. Check-list of North American birds, 7th edition. American Ornithologists’ Union, Washington, D.C. 829 p.
- Ehrlich, P., D. Dobkin, and D. Wheye. 1988. The birder’s handbook: a field guide to the natural history of North American birds. Simon and Schuster Inc. New York. 785 pp.
- Hancock, J. and J. Kushlan. 1984. The herons handbook. Croom Helm, Ltd., Kentucky.
- Hays, R., R.L. Eng, and C.V. Davis (preparers). 1984. A list of Montana birds. Helena, MT: MT Dept. of Fish, Wildlife & Parks.
- Johnsgard, P.A. 1992. Birds of the Rocky Mountains with particular reference to national parks in the northern Rocky Mountain region. Lincoln: University of Nebraska Press. xi + 504 pp.
- 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.
- Lenard, S., J. Carlson, J. Ellis, C. Jones, and C. Tilly. 2003. P. D. Skaar's Montana bird distribution, 6th edition. Montana Audubon, Helena, MT. 144 pp.
- Montana Bird Distribution Committee. 2012. P.D. Skaar's Montana bird distribution. 7th Edition. Montana Audubon, Helena, Montana. 208 pp. + foldout map.
- Mora, M. A. 1995. Residues and trends of organochloride pesticide and polychlorinated biphenyls in birds from Texas, 1965-88. Technical Report 14. Washington, D.C.: U.S.D.I. National Biological Service. 26 p.
- National Geographic Society. 1983. Field guide to the birds of North America. Second Edition. National Geographic Society, Washington, DC.
- Sibley, D. 2014. The Sibley guide to birds. Alfred A. Knopf, New York, NY. 598 pp.
- Skaar, P. D., D. L. Flath, and L. S. Thompson. 1985. Montana bird distribution. Montana Academy of Sciences Monograph 3(44): ii-69.
- Skaar, P.D. 1969. Birds of the Bozeman latilong: a compilation of data concerning the birds which occur between 45 and 46 N. latitude and 111 and 112 W. longitude, with current lists for Idaho, Montana, Wyoming, impinging Montana counties and Yellowstone National Park. Bozeman, MT. 132 p.
- Taylor, D.M. and C.H. Trost. 1987. The status of historically rare of unrecorded birds in Idaho. Unpublished manuscript. 68 p.
- U.S. Forest Service. 1991. Forest and rangeland birds of the United States: Natural history and habitat use. U.S. Department of Agriculture, Forest Service Agricultural Handbook 688. 625 pages.
- Waldt, R. 1995. The Pine Butte Swamp Preserve bird list. Choteau, MT: The Nature Conservancy. Updated August 1995.
- Watts, C.R. and L.C. Eichhorn. 1981. Changes in the birds of central Montana. Proceedings of the Montana Academy of Sciences 40:31-40.
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Citation for data on this website:
Great Egret — Ardea alba. Montana Field Guide. Montana Natural Heritage Program and Montana Fish, Wildlife and Parks. Retrieved on October 5, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=ABNGA04040