Head color and caruncles of sympatric Cathartes vultures (Aves Cathartidae) in Guyana and their possible function in intra- and interspecific signaling

Gary R. Graves

doi:10.2988/0006-324X-129.Q2.66

Head color and caruncles of sympatric Cathartes vultures (Aves Cathartidae) in Guyana and their possible function in intra- and interspecific signaling

Gary R. Graves^*

^*Corresponding author af dette arbejde

5 Citationer (Scopus)

Abstract

The naked heads of Cathartes vultures are widely believed to be adaptations for temperature regulation and to reduce plumage fouling during carrion feeding. Bright head color and the elaborate pattern of caruncles on the head and neck skin have a likely function in intra- and interspecific signaling. These integumentary characters have been difficult to study because of extensive postmortem color fading and shrinkage in museum specimens. Here I provide the first detailed description of head color and caruncles of the Greater Yellow-headed Vulture (C. melambrotus) from freshly collected specimens and provide comparative notes on sympatric populations of the Turkey Vulture (C. aura) and Lesser Yellow-headed Vulture (C. burrovianus) from Guyana.

Originalsprog	Engelsk
Tidsskrift	Biological Society of Washington. Proceedings
Vol/bind	129
Udgave nummer	1
Sider (fra-til)	66-75
Antal sider	10
ISSN	0006-324X
DOI	https://doi.org/10.2988/0006-324X-129.Q2.66
Status	Udgivet - 2016

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title = "Head color and caruncles of sympatric Cathartes vultures (Aves Cathartidae) in Guyana and their possible function in intra- and interspecific signaling",

abstract = "The naked heads of Cathartes vultures are widely believed to be adaptations for temperature regulation and to reduce plumage fouling during carrion feeding. Bright head color and the elaborate pattern of caruncles on the head and neck skin have a likely function in intra- and interspecific signaling. These integumentary characters have been difficult to study because of extensive postmortem color fading and shrinkage in museum specimens. Here I provide the first detailed description of head color and caruncles of the Greater Yellow-headed Vulture (C. melambrotus) from freshly collected specimens and provide comparative notes on sympatric populations of the Turkey Vulture (C. aura) and Lesser Yellow-headed Vulture (C. burrovianus) from Guyana.",

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N2 - The naked heads of Cathartes vultures are widely believed to be adaptations for temperature regulation and to reduce plumage fouling during carrion feeding. Bright head color and the elaborate pattern of caruncles on the head and neck skin have a likely function in intra- and interspecific signaling. These integumentary characters have been difficult to study because of extensive postmortem color fading and shrinkage in museum specimens. Here I provide the first detailed description of head color and caruncles of the Greater Yellow-headed Vulture (C. melambrotus) from freshly collected specimens and provide comparative notes on sympatric populations of the Turkey Vulture (C. aura) and Lesser Yellow-headed Vulture (C. burrovianus) from Guyana.

AB - The naked heads of Cathartes vultures are widely believed to be adaptations for temperature regulation and to reduce plumage fouling during carrion feeding. Bright head color and the elaborate pattern of caruncles on the head and neck skin have a likely function in intra- and interspecific signaling. These integumentary characters have been difficult to study because of extensive postmortem color fading and shrinkage in museum specimens. Here I provide the first detailed description of head color and caruncles of the Greater Yellow-headed Vulture (C. melambrotus) from freshly collected specimens and provide comparative notes on sympatric populations of the Turkey Vulture (C. aura) and Lesser Yellow-headed Vulture (C. burrovianus) from Guyana.

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KW - Guyana

KW - head color

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Head color and caruncles of sympatric Cathartes vultures (Aves Cathartidae) in Guyana and their possible function in intra- and interspecific signaling

Abstract

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