The billywig is an insect native to Australia. It is around half an inch long with vivid sapphire color. Its speed means that it is rarely noticed by Muggles, and wizards and witches can only spot it once they have been stung.
The bowtruckle is immensely difficult to spot, being a hand-sized, insect eating, tree dweller with long sharp fingers (two on each hand), and has brown eyes. It looks like a stickman made of bark and twigs, that serves as its camouflage in its natural habitat.