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

但是对来自中美洲和南美洲黄莺家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.

布洛克金莺和路易斯安那纳雀也在这里，还有许多莺和其他山地诗人，它们中大多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、西部纳雀、棕色鸣雀、隐士画眉、紫雀——一位出色歌手，头部和喉咙呈玫瑰红色调，——几种莺和vireos，kinglets，flycatchers等种类。