Prey species include beetles, flies, mayflies, true bugs, ants, moths, lacewings, stoneflies, and caddisflies. Many insects such as mosquitoes, mayflies, dragonflies and caddisflies have aquatic larvae, with winged adults. The most commonly eaten foods include caddisflies, blackflies, mayflies, and stoneflies. It is insectivorous, preying on flies, caddisflies, lacewings, and mayflies. Immature mayflies are aquatic and are referred to as nymphs or naiads. One of the most famous English mayflies is "Rhithrogena germanica", the fisherman's "March brown mayfly". Notable species of invertebrates include uncommon mayflies. Invertebrates including aquatic snails, chironomids, and mayflies are the main food source. Insect hatches of aquatic diptera and mayflies occur in the winter and spring months. Streams with higher populations of insects such as mayflies appear to be preferred. Callibaetis is a genus of small minnow mayflies in the family Baetidae. Ephemerellidae are known as the spiny crawler mayflies. They do not appear to be held straight up as in butterflies or mayflies. The largest mayflies are members of the genus "Proboscidoplocia" from Madagascar. They found that the Asian genus "Siphluriscus" was sister to all other mayflies.