I'm writing a story about the life of a bird for English class. In all the movies birds sleep in nests, but on Wikipedia and sites I've visited, the nests are built in spring. Is it only spring? When the birds arrive back at their summer nesting ground, do they build another nest back? I know some perching birds will go into a sleep stage while perching.

If you need a specific bird, the bird I'm writing about is the Blue Jay. Please only answer if you KNOW. I don't want guesses. If you can, please provide sources!