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- Title
PHENOTYPIC DISCRIMINATION OF THE ANDEAN IBIS (THERISTICUS BRANICKII).
- Authors
COLLAR, NIGEL J.; BIRD, JEREMY P.
- Abstract
Many authors do not recognize the highland Andean Ibis (Theristicus branickii) as a species distinct from lowland Black-faced Ibis (T. melanopis). We considered this problem using a new system of quantitative criteria for species recognition. Andean Ibis differs from Black-faced Ibis markedly in proportions (shorter bill: mean 118 vs. 140 mm; longer tail: mean 215 vs. 185 mm), structure (no wattle), and color pattern (rufous-chestnut crown, face and nape rather than rufous-chestnut crown only; larger white vs. smaller rusty-buff belly-patch). We propose elevation of Andean Ibis to full species. It is rare in Ecuador and Bolivia, vagrant in Chile and only likely to be moderately abundant in Peru.
- Subjects
PHENOTYPES; GENETICS; IBISES; BIRDS; VERTEBRATES
- Publication
Wilson Journal of Ornithology, 2011, Vol 123, Issue 3, p459
- ISSN
1559-4491
- Publication type
Article
- DOI
10.1676/10-162.1