Fleas have long legs that are modified for jumping long distances. Their eyes and antennae are small and they have sucking mouthparts. Bristletails Bristletails are small to medium sized insects, elongate and flattened with small scales covering the body. They are wingless. They have very long antennae and three tail-like appendages at the posterior end of the abdomen.
Bristletails have chewing mouthparts.
Caddisflies Caddisflies are small to medium-sized insects from 3 to 30 mm long. They are brown or gray in colour, often with a pattern on the wings. They have four membranous wings covered with small hairs, that are held roof-like over the body when at rest. Some species with very hairy wings can resemble moths. The hindwings are shorter and usually wider than the front wings.