第二幅图显示的羽毛形状与现代鸟类羽毛相似。
The second picture shows one similar in shape to those sported by modern birds.
于是他和他的同事对那些已经灭绝的鸟类羽毛的化石做了显微观察。
He and his colleagues made a microscopic inspection of fossils of feathers from extinct birds.
在温带，通常的鸟类羽毛都是灰褐色的，而翠鸟不同于它的那些北美亲属，它美得让人眼花缭乱。
In the world's temperate zones, where drab plumage is the norm, this kingfisher, unlike its North American cousins, bedazzles.
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