Mariette: I was studying the communication between the parents at the nest when I noticed that sometimes, when the parent was incubating the eggs by itself, it was producing a call that was quite different to the others.
玛丽埃特:我在研究巢穴中父母之间的交流时注意到,有时当父母自己孵卵时, 会发出与其他人完全不同的叫声。