Many groups of Canada Geese with goslings are present in the refuge in early July. Close to the start of the drive, a channel runs along the drive. It is rich with duck weed. That is prime food for a wide range of waterfowl including geese. There was one goose with four goslings working along an edge of cattails and as she led them forward, one male Red-winged Blackbird became upset with the goose. The blackbird hovered overhead and raised its voice until the goose took notice. I've seen this before.
Then, things changed. He went on the attack.