What insect emerges in the summer and makes a distinctive noise in the summer heat?

Question

What insect emerges in the summer and makes a distinctive noise in the summer heat?

Answer 1

I'd add katydids to the list as well.

Answer 2

Cicadas come to mind, as do (to a lesser extent) crickets.

See: http://en.wikipedia.org/wiki/Cicada

http://en.wikipedia.org/wiki/Cricket_%28...