Male ruffs come in three distinct varieties and that may help scientists understand what causes aggression in other animals, including humans. Biologists at Simon Fraser University in western Canada have isolated the genes which make the male birds to different from each other.
There is a black-feathered aggressor, a white-feathered wing-man, and a cross-dresser that mimics the female ruff. The scientists will begin looking at how the genes work and try to find similarities in other species.
They say that could reveal much about personality traits in humans.
The study was published in Nature Genetics.
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