Today I completed your one time service for hornets. The nest in rear tree is indeed a bald faced hornets. It was treated with an aerosol and then a liquid residual application. Then it was knocked down and removed. As advised, you will see some remaining hornets hanging around, please stay away from this area over the next day or so for these hornets may be agitated. The activity should decrease over the next few days and then totally disappear. Please contact our office if you have any questions or concerns. Thank you for choosing Green Pest Solutions and have a great day.