A number of species of frog have been raised to sophonce, usually with symbiotic bionano as well as genomic modification. The hands are modified to allow grasping and tool-use, and many have their spine and legs strengthened to walk erect, although some of the smaller ones retain the original baseline frog posture. Bufos range in size from only a few kilograms to the size of a baseline human. The legs are always strong, and all are excellent jumpers. Because they are amphibians they require a moist environment, or a moisture-tight nanotech garment.