Just as some flowers use bright colors to attract insect pollinators, other plants may use sound to lure in nectar-eating bats.  One rain-forest vine has a dish-shaped leaf located above a cluster of flowers that appears to help bats find them (and the plant's tasty nectar) by reflecting back the calls the flying mammals send out, new research indicates. 

While there is other evidence that plants use bats' sonar systems to attract them, this is the first time scientists have shown that a plant can produce an "echo beacon" that cuts through sonic clutter of reflected echoes, and that this signal can cut a bat's search time for food in half, according to the researchers, led by Ralph Simon, a research fellow at the University of Ulm in Germany.


This photo montage shows the Cuban nectar feeding bat Monophyllus beside the vine that scientists discovers attracts bats by producing an "echo beacon" with a special leaf. That sonar-reflecting leaf stands upright above the ring of flowers. The cup-like structures that hold the nectar hang below. Courtesy of Ralph Mangelsdorff and Ralph Simon

Holy Talking Plant! Flower Communicates with Bats - Wynne Parry, LiveScience