And the other thing, the other important factor for all these birds, all medium sized fellows, and this includes the next slide as well, which is a bee-eater.
还有另外一点，另外一个很重要的因素是 所有的这些鸟都是中等大小的家伙， 这也包括在下面一张投影片上的鸟，这是一只食蜂鸟.