Statistical analyses across hundreds of species revealed that bird wing and leg proportions evolve independently and accommodate divergent ecological tasks. By contrast, bat limbs evolve in unison, which potentially restricts their evolutionary capacity. We attribute this result to the common development and function of bat forelimbs and hindlimbs within the membranous wing.

中文翻译：

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蝙蝠的翅膀和腿必须一起进化的事实阻碍了生态适应


对数百个物种的统计分析表明，鸟类的翅膀和腿的比例是独立进化的，并适应不同的生态任务。相比之下，蝙蝠的肢体是一致进化的，这可能会限制它们的进化能力。我们将这一结果归因于蝙蝠前肢和后肢在膜翼内的共同发育和功能。