What to do about annoying birds?

So every freakin moring, like at 6am these crows caw loudly and wake me up, in the trees behind my house. They do it on and off for hours.They're not only an annoyance to me, but they scare the bluejays away and eat their food, so they don't come around anymore. The crows just migrated here in the past year and they're pests. Any ideas/suggestions to get rid of them????