Sunflower That a Bird Planted

This is one sunflower of many that birds planted somehow by accidentally dropping black-oil sunflower seeds into a pot of soil. If you click the picture and look at the full-size picture, you can see there are two bumble bees on the head. This one is huge, at least six to seven feet, and standing tall. There are several more in the picture, one now with it's head drooping. There are about 20 to 30 around my house, all planted by birds except one. After I realized birds had made sunflowers start sprouting up, I planted one of my own. It's now about three feet and still growing. Next year I'm going to plant a lot more, and I'm sure the birds will, too.