But an exhaustive survey of the tanagers, a family of songbirds from Central and South America, shows no sign of a tradeoff.

但是对来自中美美黄莺家族唐纳雀进行一份详细调查表明，这种鸟类在这两方面表现都很出色。

Bullock's oriole and the Louisiana tanager are here also, with many warblers and other little mountain troubadours, most of them now busy about their nests.

布洛克金莺路易斯安那唐纳雀也在这里，还有许莺其他山地小吟游诗人，它们中数现在都在忙着筑巢。

We have beautiful scarlet tanagers, song sparrows.

我们有美丽猩红色塔纳吉斯， 鸣雀。

The black-headed grosbeak, too, is here, with the Bullock oriole, and western tanager, brown song-sparrow, hermit thrush, the purple finch, — a fine singer, with head and throat of a rosy-red hue, — several species of warblers and vireos, kinglets, flycatchers, etc.

黑头蜡嘴鸟也在这里，还有布洛克金莺、西部唐纳雀、棕色鸣雀、隐士画眉、紫雀——一位出色歌手，头部喉咙呈玫瑰红色调，——几种莺vireos，kinglets，flycatchers等种类。