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GAP Analysis Predicted Distribution Map

Common Loon (Gavia immer)

Species Code: GAIM

This is an "at risk" species

Click to enlarge Range map

= Core Habitat
= Marginal Habitat

Breeding Range Map
The green area shows the predicted habitats for breeding only. The habitats were identified using 1991 satellite imagery, Breeding Bird Atlas (BBA), other datasets and experts throughout the state, as part of the Washington Gap Analysis Project. Habitats used during non-breeding months and migratory rest-stops were not mapped.

Metadata (Data about data or how the map was made)

Click to enlarge distribution map

Map with Breeding Bird Atlas records

Other maps & Information:
  • Breeding Bird Atlas
  • NatureMapping observations
    during breeding season
  • NatureMapping observations
    throughout the year

The Common Loon is local and uncommon in large freshwater lakes and reservoirs within forested landscapes. Nesting locally in suitable water bodies in the northeastern counties and in large reservoirs in western Washington.

This species was modeled for this map only in lakes and reservoirs for which there wa recent breeding evidence. All zones in which it was modeled were core (Puget Sound Douglas-fir, Western Hemlock, Interior Douglas-fir, Grand Fir, Interior Western Hemlock, and Ponderosa Pine).

Loons have a well-documented need for quiet lakes with suitable emergent vegetation and fish in sufficient numbers to sustain young. Recreational boat traffic and development of lakes has resulted in a decrease of the available habitat for Common Loons in Washington. However, in some areas loons have been able to adapt to disturbance, e.g., there was a pair that nested successfully on Lake Whatcom in the early 90's. It is possible that loons may also breed in secluded bays or sloughs along some of the major rivers as they historically have.

Translated from the Washington Gap Analysis Bird Volume by Uchenna Bright
Text edited by Gussie Litwer
Webpage designed by Dave Lester