AP- Bio

Justine Alford wrote on http://www.iflscience.com/plants-and-animals/male-hummingbirds-use-beaks-daggers-stab-opponents-throats about how hummingbirds in South America put on shows and battle for mates. These birds have mating dances in which they shake their feathers and then kill other males. This is natural selection because some bird will have short beaks and reproduce less, there are a huge mass of birds that keep getting longer and shaper birds, the birds with the longest sharpest beaks and the prettiest dance will mate for and have more offspring, and after an amount of time goes by scientist think most of the population will have longer beaks beaks than now. I think this study is interesting because it is natural selection and sexual selection.

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