Now the China-mark is interesting because it is one of the few moths that have aquatic larvae. The larvae live under water until they are … um … ready to pupate. The interesting thing about this particular species is that they have, er … um … you know, two forms of female. The male, of course, is fully winged and flies about when it hatches and er … so does one of the females. But the other female when it hatches out has, um … no wings and continues to live under the water, using its legs to swim with.’
