Lichen Sticks are a perfect natural accent for Tropical or Desert terrariums. You can place the Lichen Sticks throughout the terrarium in bunches or separately to enhance your reptile's or amphibian's environment. The Lichen will not grow in a terrarium setting, but will not die off. Sticks will vary in size, 4"-5" long and 3/4" - 1.5" thick.