Breeding range extends through southern Canada, the Dakotas, Montana, and Idaho into eastern Oregon, and south into Nevada andf California. Until the 1980's thought to be a pale morph of the Western Grebe. The Clark's Grebe, Western Grebe, Eared Grebe and the Red-necked Grebe are found in the western regions. Studies in the 1970s and 1980s showed that Western and Clark's, though extremely similar, are actually two distinct species. White face, black cap extends nearly to red eyes. Direct … Intermediates between the two species are known. Until the 1980s, it was thought to be a pale morph of the Western Grebe, which it resembles in size, range, and behavior. Clark's Grebe: Large grebe, gray-black upperparts, white underparts, and slender neck with white on front and black on back. As a family, grebes are known for their elaborate courtship displays. Minor differences in face pattern, bill color, and voice seem to be enough to prevent the two from interbreeding … Clark's Grebe. Discover Life's page about the biology, natural history, ecology, identification and distribution of Aechmophorus clarkii - Clarks Grebe -- Discover Life Aechmophorus clarkii (Lawrence, 1858) CLARKS GREBE Title Clark's Grebe Range - CWHR B548 [ds1684] Publication date 2016-02-0100:00:00 Presentation formats digital map FGDC geospatial presentation format vector digital data Other citation details These are the same layers as appear in the CWHR System software. CLGR. Bird Description Same as WEGR for most features, but about 10 times scarcer. Fall migrants away from the breeding range are most conspicuous, though rare, in Sep-early Oct. As with Western Grebe, lingering birds are found each fall at Lake McConaughy; there are about 16 records there (including two for CBC Count Week) 10 Nov-2 Jan 1997-2017 (Brogie 1998). The Least Grebe is the smallest in the family and lives in the most southerly regions of the United States and into Mexico. It ranges in size from 22"-29". Show Breeding Range Codes and IUCN Status Codes Breeding Range … Bill is yellow-orange. However, most can be separated. Aechmophorus clarkii. Clark's Grebe (Aechmophorus clarkii) is a North American species in the grebe family. Click here for more information about the Red List categories and criteria Justification of Red List category This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small … Intermediates occur, and hybrids or individual variation arguably make some birds impossible to id. Very similar to [Western Grebe], but on Clark's note that the eye is surrounded by white feathers, and the bill is bright yellow. The neck structure of the Clark's Grebe allows it to thrust its beak forward, like a spear, which it does to catch prey. Described to science in 1858, Clark's Grebe was soon dismissed as a mere variant of Western Grebe, and thereafter was ignored for over a century. Often found together. During winter Clark's Grebe is found along the Pacific coast to central Mexico, and inland where there is open water. Each map is a visual guide to where a particular bird species may find the climate conditions it needs to survive in the future. Clark's Grebes and the closely related Western Grebes perform the most spectacular displays of the family, and arguably the most complex known for any birds. Clark's Grebe Aechmophorus clarkii The Clark's Grebe is black-and-white, with a long, slender, swan-like neck. Among its distinguishing features is its bill, which is slightly upturned and bright yellow, whereas the Western Grebe's bill is … As WEGR for most features, but about 10 times scarcer Montana, and south into Nevada California. Red eyes white on front and black on back pale morph of the Western Grebe gray-black. 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