And they respond to the seet calls the same way they do to the sounds of cowbirds themselves.

听到seet叫声后，它们的反应与听到棕头牛鹂叫声时一样。

Yellow warblers, for example, produce a certain type of call to warn other warblers about nearby cowbirds.

例如，黄莺会发出某种类型的叫声，以警告其他莺附近有牛鸟。

Yellow warblers, for example, produce a certain type of call to warn other warblers about nearby cowbirds. Researchers call it a " seet" call.

比如，黄莺会发出某种叫声，提醒同类周围有棕头牛鹂。研究人员称之为“see”叫声。

Ornithologists have used 3D printed eggs-- to study how robins deal with eggs from parasitic cowbirds that are laid in their nests.

鸟类学家使用 3D 打印的蛋来研究知更鸟如何处理产在巢穴中的寄生牛鸟蛋。

But alas! We do like cowbirds and cuckoos, which lay their eggs in nests which other birds have built, and cheer no traveler with their chattering and unmusical notes.

可是，唉！我们不喜欢燕八哥和杜鹃，它们跑到别个鸟禽所筑造的巢中去下蛋，那叽叽喳喳的不协和乐音并不能使行路经过的人听了快乐。

With 3D printing, researchers can create cowbird eggs that vary subtly in size and shape-- and their research can now be reproduced by others using the same 3D model.

通过 3D 打印，研究人员可以制作出大小和形状略有不同的牛鸟蛋——他们的研究现在可以被其他人使用相同的 3D 模型复制。