pruning native trees
About 12 years ago we planted several native trees and shrubs in our garden to attract wildlife. There are a rowan, hazels, wayfaring tree, field maple, and crab apple (I'm not sure if we actually planted this one or if it just arrived on its own.) There are also several hollies which have self-seeded. However, our lovely woodland edge habitat is now becoming a nuisance to our very friendly neighbour, who has politely asked us to cut them back as they are shading his garden too much. Also the hazels are threatening to take over the entire garden! What can we do to keep our neighbour happy but not lose our trees by over-pruning?
I have noticed that he has bird boxes and feeders all along the fence under our trees. If we cut them back to just above fence height, say about 8ft, will the trees die, and might the birds object and desert his nest boxes?