Bewick's Wrens attack squirrel near nest slo mo then real time

Portland, Oregon, USA. These Bewick's Wrens had a nest in a roosting pocket under our covered porch. As the nestlings were getting near fledging age, the wrens became very protective of the area. Here they work together to chase away a squirrel. The video is first shown in slow motion (.5x), followed by the same footage in real time.