Why do some birds have long tails, others have bright plumage or patterns and others possess beautifully complicated songs. Many animal behaviourists have agreed that all these characteristics are developed as a result of female sexual selection, but that is where the agreement stops. The many theories on the evolution of secondary sexual characters, are an evolution in their own right. The purpose of this paper is to analyse the evolution of the research and …
showed first 75 words of 2869 total

showed last 75 words of 2869 total
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