The Story of Doctor Dolittle by Hugh Lofting

And for three days and three nights the monkeys kept coming from the jungles and the valleys and the hills to the little house of grass, where the Doctor sat all day and all night, vaccinating and vaccinating.

The Dunwich Horror by H. P. Lovecraft

In the spring after this event Old Whateley noticed the growing number of whippoorwills that would come out of Cold Spring Glen to chirp under his window at night. He seemed to regard the circumstance as one of great significance, and told the loungers at Osborn’s that he thought his time had almost come.