We have been learning about invertebrates. One day a scientist came and showed us a bit about invertebrates and he came on Thursday. He taught us that every invertebrate lays eggs. Did you know invertebrates are the biggest animal group in the world? Invertebrates have no back bone. They are cold blooded. The man who came in was called Mr Mel and he was Miss Galbraith's dad and he was awesome. Invertebrates change shape which is called metamorphosis. He showed us a giant cave weta. The female wetas have an ovipositor. The male wetas have a spnie out of their bottoms.