What do you think this could be a picture of? Here's a hint - when I was a kid we called them "helicopters".
They are maple tree seeds. We called them helicopters because of the way they spin when they drop off the tree. The seed part lands down into the dirt or grass, in just the right position to take root and grow.
I am surprised by how far these are spread. Most are still hanging on the tree, waiting to fall and yet the lawn is filled with them. They have made their way over our entire back yard. God has created so many plants, each unique and with their own way of spreading seeds. Isn't He amazing?