I guess they're passed out drunk....
It tells me my answer "the calm parrots are asleep" is wrong.
However, as someone who speaks pretty good English I can tell Duolingo that my answer is absolutely right! :)
They mean the same but "asleep" is an adverb and the Latin sentence does not have an adverb in it.
I just love this audio...
Again: love this speaker!
You should hear her when drunk.