Caddis larva comes in two forms, those that build portable homes (Stick Caddis) and free living. All caddis larvae have a hardened section near and including the head, whilst the bodies are soft and range in colour from off-white through to a dirty yellow and some have green bodies in a variety of shades. They also have a set of claws at the end of their bodies. Stick or case caddis use these claws to cling onto the inside of their portable case.