The Spring Peeper is the phylum is Chordata because it at one point in its life a notocord, dorsal nerve chord, post-anal tail, and pharyngeal gill slits.
The Spring Peeper is in the order Anura because it does not have a tail when it is a adult. It also has a shortened vertebrate column and longer hindlimb compared to forelimbs.
The Spring Peeper is in the family of the Hylidiae because it has claw shaped feet with toe pads. The skull bone is connected to the lower layer of the skin. It also has short webbed toes and an extra piece of cartilage in the toes.