What Type of Tree Has Helicopter Seeds?

Samaras, or "maple keys," are dropped in late summer or early fall before the trees have lost their leaves. The twirling motion allows the wind to carry the pods a considerable distance, allowing for superior seed dispersal. Worldwide, there are approximately 128 species of maple. The majority are found in Asia, but they are also found in North America, northern Africa and Europe. With the exception of one species, all are native to the Northern Hemisphere.