Adaptive significance of the mega-billed form in the polymorphic Black-bellied Seedcracker Pyrenestes ostrinus

Ibis

Volumn 139, Issue 2, 1997, Pages 382-387

  Smith, Thomas B ^a  

^a SAN FRANCISCO STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

PYRENESTES OSTRINUS;

BILL POLYMORPHISM; BLACK-BELLIED SEEDCRACKER;

CAMEROON;

EID: 0030617874     PISSN: 00191019     EISSN: None     Source Type: Journal    
DOI: 10.1111/j.1474-919x.1997.tb04638.x     Document Type: Article

References (20)

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3. Chapin, J. P. 1924. Size-variation in Pyrenestes, a genus of weaver-finch. Am. Mus. Nat. Hist. Bull. 49: 415-441.
4. Etia, P.M. 1980. Climate. In Laclavere, G. (ed.) Atlas of Cameroon: 16-19. Paris: Jeune Afrique.
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12. Smith, R.J. & Smith, T.B. 1989. Portable device for measuring seed hardness. J. Field Ornithol. 60: 56-59.
13. Smith, T.B. 1987. Bill size polymorphism and intraspecific niche utilization in an African finch. Nature 329: 717-719.
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15. Smith, T.B. 1990b. Patterns of morphological and geographic variation in trophic bill morphs of the African finch Pyrenrstes. Biol. J. Linn. Soc. 41: 381-414.
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17. Smith, T.B. 1991. Inter- and infra-specific diet overlap during lean times between Quela erythrops and bill morphs of Pyrenestes ostrinus. Oikos 60: 76-82.
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