Owling is a short-lived internet joke: you sit on your feet with your knees up, often in a place where a person should not sit — a fence, a fridge, a statue — so that you look a bit like an owl, and then someone takes a photo to put online. It followed fashions like planking: the point is the odd picture, not a real sport or a bird study. The word is informal, dated, and tied to that meme; most people under a certain age may never have heard it, and you would not use it in class unless you were talking about old internet trends. Though actually, English had another owling long before cameras: sneaking sheep away at night, when owls are calling. Same spelling, completely different job. The sense here is only the photo pose.

學貓頭鷹蹲著拍照（舊網路潮流）