Dear Keiva: You mistake me I admire border collies, only deplore their unhappiness when denied a chance to employ their abilities at herding animals. Hummingbirds I have watched for many hours duelling, but very careful never to injure. Ruby seems a better description. My dictionary says "rufous" is rust color, like William the Conqueror was called "Rufus". For a really mean bird, I have seen kingbirds sit on the backs of eagles, plucking out a stream of feathers, to suggest to the eagle not to trespass on the kingbird's territory.