PhysOrg Posted August 1, 2018 Share Posted August 1, 2018 For a small, reddish-beaked bird called the zebra finch, sexiness is color-coded. Males have beaks that range from light orange to dark red. But from a female's point of view, a male's colored bill may simply be hot, or not, new findings suggest. View the full article Link to comment Share on other sites More sharing options...
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