|6221||TALKING TO STRANGERS||TALKING TO STRANGERS||1991||color||49 min||vhs|| (Trials of Life: A Natural History of Behavior series, Part 10)
Most animals use ripples in the air; they communicate with sound. In the rainforests of Brazil, for example, the screaming piha makes the loudest sound of any bird. Competing male frogs in Panama make so much noise that they have developed a special system to avoid jamming each other's signals. The sea is also an excellent medium for the communication of sound. The loudest of all sounds in nature is made by blue whales who sing to one another across oceans. A male toadfish, humming all night in the San Francisco Bay in search of a mate, forced residents of a houseboat in the area to leave in quest of peace.