这虽证明是学习北美鸟的一个有效的方法，但他仍要把他的未成熟的照片同他继续欣赏的那些出版的照片相比。
While this proved an effective method for learning about North American birds, he couldn't help comparing his rudimentary images to the published photos he continued to admire.
例如，四趾的始祖鸟先于三趾的始祖鸟出现，但北美的化石证据表明，这两种动物之间有一个急促而不均衡的转换过程。
The four-toed Eohippus preceded the three-toed Miohippus, for example, but North American fossil evidence suggests a jerky, uneven transition between the two.
最后一次在北美大陆上对象牙嘴啄木鸟无争议的观测是在1944年的美国路易斯安那州。
The last undisputed report of an ivory-billed woodpecker in continental North America was in Louisiana in 1944.
北美洲东部大型金翼啄木鸟，颈红色，腹部、翅膀和尾巴为黄色。
Large flicker of eastern North America with a red neck and yellow undersurface to wings and tail.
一种常见的北美雀鸟(歌雀)，长有条纹状、褐色的羽毛，以其宛转动听的歌声著称。
A common North American sparrow (Melospiza melodia) having streaked brownish plumage and noted for its melodious song.
食米鸟生活在北美洲。
美洲白骨顶是一种鸟，它们生活在北美并且长得像野鸭。
头、胸和尾为紫红色的北美洲小雀鸟。
North American finch having a raspberry-red head and breast and rump.
巨嘴鸟是北美的一种鸟。
肯塔基州的州花是紫莞花，州鸟是北美红雀，而它的首府是法 兰克福（Frankfort）。
The state flower is the goldenrod, the cardinal is the state bird and Frankfort is the capital.
肯塔基州的州花是紫莞花，州鸟是北美红雀，而它的首府是法 兰克福（Frankfort）。
The state flower is the goldenrod, the cardinal is the state bird and Frankfort is the capital.
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