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Morphometric changes in Yellow-headed Blackbirds during summer in central North Dakota

Western North American Naturalist

5834_Twedt.pdf
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Abstract

Temporal stability of morphometric measurements is desirable when using avian morphology as a predictor of geographic origin. Therefore, to assess their temporal stability, we examined changes in morphology of Yellow-headed Blackbirds (Xanthocephalus xanthocephalus) from central North Dakota during summer. Measurements differed among age classes and between sexes. As expected, due to growth and maturation, measurements on hatching-year birds increased over summer. Measurements of adult plumage fluctuated with prebasic molt and exhibited age-specific discontinuities. Body mass of adult birds increased over summer, whereas both culmen length and skull length decreased. Only body length and length of internal skeletal elements were temporally stable in adult Yellow-headed Blackbirds.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Morphometric changes in Yellow-headed Blackbirds during summer in central North Dakota
Series title:
Western North American Naturalist
Volume
62
Issue:
1
Year Published:
2002
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
39-43
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Western North American Naturalist
First page:
39
Last page:
43
Number of Pages:
5