Give this method a try that John the bee master decribes in another post.
"I've set up a plastic tarp under the tree branch before strung between ajoining trees with a hole in the center of the tarp with a bucket below. The tarp slopes like a huge funnel to the bucket and I used a weight on a clothes line to toss up and grab the branch.
I and my wife grabbed tight to the rope, jerked it hard and 90% of the bees fell straight down into the tarp and slid into the bucket - I quickly covered it and waited for the airborn and remaining bees to reland on the branch BEFORE repeating the process.
Meanwhile, I dumped the bees into a readied hive and blocked the entrance so they could not escape - I had no idea WHERE the queen was, so I had to assume she was STILL on the branch.
After two more tries I had most all the bees and GOT the queen... After an hour sealed in the hive I opened the entrance and the stragglers made their way to their new hive.
I hope the members describe other methods, including chemical pheromones, swarm traps, etc.. so there are many methods and I'm sure you'll read more here soon".
You may get your bees back this way and expand your yard.
Sorry it took me so long to finally find this and post it.