Extreme reversed sexual dichromatism in a bird without sex role reversal

Heinsohn, Robert, Legge, Sarah, and Endler, John A. (2005) Extreme reversed sexual dichromatism in a bird without sex role reversal. Science, 309 (5734). pp. 617-619.

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Abstract

Brilliant plumage is typical of male birds, reflecting differential enhancement of male traits when females are the limiting sex. Brighter females are thought to evolve exclusively in response to sex role reversal. The striking reversed plumage dichromatism of Eclectus roratus parrots does not fit this pattern. We quantify plumage color in this species and show that very different selection pressures are acting on males and females. Male plumage reflects a compromise between the conflicting requirements for camouflage from predators while foraging and conspicuousness during display. Females are liberated from the need for camouflage but compete for rare nest hollows.

Item ID: 7119
Item Type: Article (Research - C1)
ISSN: 1095-9203
Date Deposited: 06 Apr 2010 00:20
FoR Codes: 06 BIOLOGICAL SCIENCES > 0699 Other Biological Sciences > 069999 Biological Sciences not elsewhere classified @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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