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Mandible (Jawbone ) of the Western Grebe Aechmophorus occidentalis (YPM 104291)


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Phylogenic Position
Aves - Neognathae - Podicipediformes - Podicipedidae - Aechmophorus - Aechmophorus occidentalis
Species Description
The Western Grebe is the largest North American grebe. It is easily confused with Clark’s Grebe, which was until recently considered a subspecies of the Western Grebe; it is now classified as a separate species, though hybrids can be found in places where the two species’ ranges overlap. The Western Grebe eats primarily fish, which it catches by use of a specialized neck structure that allows the grebe to thrust its beak forward to spear fish. Like all grebes, it is a foot-propelled diving bird; while its backset legs make it an efficient swimmer, the Western Grebe is awkward on land, and can run only with great difficulty. During courtship displays, a pair of grebes will rear up onto their feet and patter together across the water.
Specimen Information
Species Aechmophorus occidentalis (Western Grebe)
Element Mandible (Jawbone )
Specimen Number YPM 104291
Sex Male
Location USA: California, Santa Barbara Co.
Geological Age Recent
 
Technical Information
Scanner Konica Minolta Range7
Resolution 100 µm
Number of Data Points 207720
Number of Data Polygons 103843
Date Scanned July 06, 2009
Scan Technician Stephanie John
Edited By Rachael Martinez
 
Photographs


View All 2 Images

Download Digital Model Size
STL File Not Publicly Available 10.4 MB
Other Aechmophorus occidentalis (Western Grebe) Elements
Specimen Element
YPM 104291 Sternum (Breast Bone)
YPM 104291 Right Tarsometatarsus (Right Fused Element Consisting of Ankle and Middle Foot Bones)
YPM 104291 Right Humerus (Right Upper Arm Bone)
YPM 104291 Left Humerus (Left Upper Arm Bone)
YPM 104291 Furcula (Wishbone)
YPM 104291 Cranium (Skull)
YPM 104291 Left Tarsometatarsus (Left Fused Element Consisting of Ankle and Middle Foot Bones)
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