Birds in the wild can groom their nails, or claws, on the rough branches of trees. They can bathe in the rain, the ocean, bay, or brook. But what about pet birds? They also have a natural need to groom themselves.
When you get old, you should not have to vacuum. You read that here first. So someone invented a Laser Guided Robotic Vacuum for us boomers and other folks who would rather be doing anything else but vacuuming. Even if you had a maid, she wouldn't vacuum this good for, although the robot moves around a lot like a human, its laser vision is better than ours.