I don't know what is spraying (or flying)from this nuthatch's mouth. If you know, please tell me. You can click the image for a bigger view if you can't see what I'm talking about...
I don't know why this nuthatch is rubbing on the tree. I suppose he's just scratching an itch (darn flees...)

True masculinity. In one species, one must only flash a bit of ruby, in other's one must raise their pickup three feet and put on huge tires.