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Montana Animal Field Guide

Montana Field Guides

Clark's Grebe - Aechmophorus clarkii

  • Clark`s Grebe
  • Clark`s Grebe, After Dusk
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Species of Concern

Global Rank: G5
State Rank: S3B

Agency Status
USFWS: none
USFS: none
BLM: none
CFWCS Tier: 3
PIF: 3
 

General Description
Sexes similar in size and plumage. Black crown with yellow beak and white neck; back of neck gray. Top of body mostly gray with speckled white spots. Coverts white with speckled gray.

General Distribution
Montana Range



Western Hemisphere Range

 


Summary of Observations Submitted for Montana
Number of Observations: 93

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

Recency

Breeding
(direct evidence "B")

Breeding
(indirect evidence "b")

No evidence of Breeding
(transient "t")

Overwintering
(regular observations "W")

Overwintering
(at least one obs. "w")


 

(Records associated with a range of dates are excluded from time charts)



Migration
Extreme sighting dates are April 25, 1993 at Freezeout Lake Wildlife Management Area (M. Schwitters) and October 21, 1995 at Somers (D. Casey).

Habitat
Clark's Grebes are only reported breeding at very large lakes and reservoirs in Montana. Nesting on Lake Helena was near mid-lake on mats of aquatic plants that had reached the surface.

Food Habits
Diet consists of mainly fish, aquatic invertebrates along with a few amphibians and feathers.

Reproductive Characteristics
Single brooded species with three to four eggs per brood. Incubation period 23 days. Young able to fly 63-77 days after hatch.

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Citation for data on this website:
Clark's Grebe — Aechmophorus clarkii.  Montana Field Guide.  Retrieved on February 9, 2010, from http://FieldGuide.mt.gov/detail_ABNCA04020.aspx
 
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