Thanks Silence!I've been busy at work (and will probably stay busy for a while yet) but over the weekend I saw something fairly inspirational: a bullock's oriole, a brightly colored but fairly small bird, entered a colony of much larger black-crowned night herons, and harassed and harassed and nipped a heron, and ultimately, the heron flew away.

A male Bullock's oriole, resting for a moment between attacks on a heron