"That owl says hoot."
Translation:Tuo pöllö sanoo huhuu.
Not sure why you're being downvoted. In the UK, as children, we learn that the owl says "twit twoo", however this is because tawny owls are the most common (and that is a rough approximation of their different calls). I'm not sure whether the Finnish huhuu is a verb or is onomatopoeic but I definitely see "hoot" as the verb more than the sound owls make. However I can appreciate the linguistic differences even within English itself so I wouldn't say that hoot is incorrect.