Another parasitic wasp that lays eggs in the brood chamber of other insects is the giant ichneumon wasp, Megarhyssa. Unlike the cuckoo wasp, which actually enter the hosts' nest to do their dirty work, the ichneumon uses a long, thin tube known as an ovipositor (seen here, trailing nearly 2 inches behind) to drill through the wood in which the unfortunate victim has ensconced their own eggs. The eggs are then passed down the tube and onto (in some cases into) the host brood.