mate choice
grrlscientist | March 22, 2009tags: evolutionary biology, mate choice, sex determination, genetic compatibility, behavioral ecology, Gouldian Finch, Erythrura gouldiae, peer-reviewed paper
The three color morphs of Gouldian finches, Erythrura gouldiae.
Image: Sarah Pryke, Macquarie University.
Gouldian finches, Erythrura gouldiae, are small cavity-nesting passerines that are endemic to open savannahs adjacent to mangrove swamps in northern Australia. These finches eat a variety of native grass seeds, but to meet the increased energetic and nutritional demands of rearing chicks, they primarily eat insects when…
grrlscientist | December 17, 2007tags: researchblogging.org, blue tits, Cyanistes caeruleus, Parus caeruleus, sexual selection, mate choice, ornithology, female coloration, reproduction, maternal quality, evolution, birds, ornithology
In many bird species, the females are brightly colored, just as the males are, but the evolutionary reasons for brightly colored females is unclear. According to one hypothesis, because males and females share the same genome, their traits are similar. However, according to another hypothesis, there may also be selective pressures on females, just as there are on males, to develop brightly…