They tested different toe arrangements of peregrines and parrotlets to see if one was better suited to perching.

他们测试了游隼和鹦鹉的不同脚趾排列方式，看看哪一种更适合栖息。

And they keep up this peeping and cheeping even after those siblings have flown the coop, leaving them the last little parrotlet left in the nest.

霍普金：即使在那些兄弟姐妹飞出鸡舍之后，它们也会继续偷看和吱吱叫，把它们留在巢中的最后一只小鹦鹉。

Scientists drew on the anatomy and flight data of peregrines and parrotlets to model bird landings, accounting for variables such as the angle and distance to an object.

科学家利用游隼和鹦鹉的解剖结构和飞行数据来模拟鸟类着陆，并考虑到物体的角度和距离等变量。