Acronym Soup: WOMBAT?

Questions

Common name for small, bloodsucking, wingless insects?

Common name for soft-bodied, usually parasitic animals, the simplest of animals possessing heads?

Common name for solitary, slow-moving lizards, so named for their shape & their well-developed, protective, bony osteoderms (scales) that lie just beneath the outer skin?

Common name for the five species of a family of birds having exceptionally long legs & long, highly flexible necks?

Common name for the species of a genus of large birds having a long, large, flattened bill, the upper mandible terminated by a strong hook that curves over the tip of the lower one?