Do whites tree frogs have to have mates when you buy them?

White's tree frogs do not have to have a mate. I have had one for five years, now. He's a terrific fellow and a good pet - easy to care for, friendly, and entertaining. We live in a rural area with a pond behind the house. In the summer one can hear frogs croaking all night until dawn. Flip, my White's tree frog, happily sings along.