Butterflies are half of the insects in the order Levidoptera. A butterfly is a mainly day-flying insect of the order Lepidoptera, which includes the butterflies and moths. Like other holometabolous insects, the butterfly's life cycle consists of four parts: egg, larva, pupa and adult. Most species are diurnal. Butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. Butterflies comprise the true butterflies, the skippers and the moth-butterflies. Although in biology there are always exceptions, the easiest way to tell a butterfly apart from a moth is to look at the antennae. Butterflies will have antenna with a clubbed enlarged tip.