[Sam Cree]

On this page, scroll down past the 2 "female warning" calls to "male tokay...mating call" to hear how the sound they are apparently named for.

http://www.gekkota.com/html/sounds_g__gecko.html

Good night all.

[Bear_in_RoseBear]

That's pretty cool! The geckos I've seen here are fairly small, maybe 5 or 6 inches from tip to tail at the largest. They probably aren't loud enough to be heard easily.