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Montana Field Guide

Montana Field Guides

Ancient Murrelet - Synthliboramphus antiquus

Native Species
Accidental Species

Global Rank: G4
State Rank: SNA

Agency Status


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Copyright by: The Macaulay Library at the Cornell Lab of Ornithology, Ithaca, NY, all rights reserved.
General Description
The Ancient Murrelet is a year-round resident of the Aleutian Islands, Gulf of Alaska, and islands off of the coast of central British Columbia (Sibley 2014). This species winters off of the Pacific coast throughout its breeding range south to central California (Gaston and Shoji 2010). In Montana, the Ancient Murrelet has several historic records but only two over the last decade (Montana Bird Distribution Committee 2012).

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.

Species Range

Western Hemisphere Range


Observations in Montana Natural Heritage Program Database
Number of Observations: 12

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


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)

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Citation for data on this website:
Ancient Murrelet — Synthliboramphus antiquus.  Montana Field Guide.  .  Retrieved on , from