National Geographic : 1932 May
©Lynwood M. Chace THIS UNUSUAL PICTURE SHOWS THE AMERICAN TOAD (BUFO AMERICANUS) TRILLING HIS EVENING SONG The male toad sits in a puddle and with throat puffed out serenades his lady. Every trill gives a thrill, nodoubt. During the call the mouth and nostrils are closed while the air is driven back and forth between lungs and mouth. Some of the air escapes into the balloonlike resonating organ, which immediately fills up and often extends in front of the head (see page 629).