That’s a birdbath. The water is a big deal right now with the heat. Sometimes we get congregations of finches, or bluebirds, scrub jays, or mixtures of whoever happens by. They are pretty well not aggressive with each other; everybody needs a drink. Sometimes ravens stop by. They are so gigantic they take over the entire joint. I don’t mind the ravens except when they bring their finds to the birdbath and leave them there to soften them up before eating. Under-ripe fruit is one of their favorites, but occasionally we get what they dug out of someone’s garbage can. Gack. Cleaning it out is a once a day affair.