Every time I looked out my kitchen window today, the air was alive with flying helicopter seeds. What maple tree was shedding these is unknown to me. All maples produce these helicopter seeds, including the silvers and reds. They are also known as whirligigs and twisters, and a few other fun nicknames. Samara is an official name for them,and in Hebrew it means "guardian."
I prefer to find the dry ones that have landed on open ground. This way I can have fun launching them into the air for a second or third flight. Maple seeds evolved to have wings in order to increase their chance of procreation. They need to fly to get out from under their parent's shade.