To be fragrant or not: Why do some male hairstreak butterflies lack scent organs?

16 septiembre 2015

Female butterflies generally choose among male suitors, but with hundreds of related species living in close proximity, how can they decide which are the right ones? A solution is that males have scent producing organs on their wings. Strangely, some lose theirs during evolution. Is this a disadvantage?
http://www.sciencedaily.com/releases/2015/09/150916125506.htm

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