The two beavers in the following photos are two siblings in a family of at least six beavers. There are two more younger ones, born the following year. Although each beaver has its own set of tasks, the two sets of siblings do appear to hang out as pairs at various times.
I spotted one of the two heading down towards the water channel, when suddenly the second one quickly appeared running through the grass to catch up to its sibling. And there they were, nose to tail, heading into the water, off on another harvesting mission for material to winterize their lodge (Photo #1 to Photo #3).
And it was another busy day of transporting branches & logs from the trees fallen by the adults.
As the afternoon drew to a close, the only two beavers who remained above water were these two older siblings, nibbling at the branches that rested above water, next to the lodge.
A quick snack and then the wrestling match began, all in fun, of course. Nothing violent but it had all the appearance of two teenagers having a friendly tussle on the living room sofa (Photo #4 through to Photo #9).
After a few minutes, one dived under and then the other, most likely to join the rest of the family at the lodge.