We have beautiful scarlet tanagers, song sparrows.

我们有美丽的猩红色塔纳吉斯， 鸣雀。

For one thing, in this study, there was only about a twofold difference in relative brain size between the species with the largest brain — the song sparrow — and the one with the smallest — the Swainson's Thrush.

一方面，此研究中脑容量最大的北美歌雀和脑容量最小的斯氏夜鸫，二者的相对脑容量只有两倍差别。