A cicada is an insect with a stout body, a wide, blunt head, protruding eyes, and two pairs of membranous wings. Male cicadas have platelike membranes on the thorax, which they vibrate like drum heads, producing a loud, shrill sound. The Magicicada species have the longest known life cycles of any insect–17 years. They live only one week as winged adults, however, spending the rest of the time in the form of larvae, burrowed underground. To what are their long life cycles an adaptation? Discuss
Source: The Free Dictionary