I would say that taken as a whole, this particular story is more sad than humorous. It's terrible how the people treat the old man with wings, and they do it for selfish gain; however, there are moments in the story that will cause the reader to perhaps chuckle a little bit. I would say that in general, the story's use of hyperbole can be a bit funny. For example, readers are told in hyperbole about the man's age.
"He's an angel," she told them. "He must have been coming for the child, but the poor fellow is so old that the rain knocked him down."
That's a slightly funny comment if you think about a person literally being knocked down by the rain; however, it's also a very good image of exactly how frail he must look, and that is not funny.
The small paragraph that discusses the letters being sent from Rome asking about the man is a bit humorous because of how ridiculous the questions are.
They spent their time finding out in the prisoner had a navel, if his dialect had any connection with Aramaic, how many times he could fit on the head of a pin, or whether he wasn't just a Norwegian with wings.
Really? A Norwegian with wings? That's such a random question that it's funny. Finally, there is that great little sentence about a girl that has been turned into a spider for disobeying her parents. It's so fantastical, yet treated so normal that readers can't help but chuckle and shake their heads.