
Gliders make a large variety of sounds and each sound will vary from glider to glider. However, here's a small collection of some of the sounds that my own gliders have made.
Barking: gliders bark to communicate with each other and find out where their friends/cagemates are
Hope(a glider I was pet-sitting)Barking
Chirping: gliders chirp when they're happy, mostly when eating delicious treats, such as mealworms
Crabbing: gliders crab to when they are upset or startled
Singing: mom's will "sing" to their joeys when they're about to come OOP