The female mud-dauber wasps use the mud balls to build their nests. Collecting them into clusters, they then carve chambers inside the balls into which the females lay their eggs. Before closing each ...

An Aussie was puzzled this week after she discovered what appeared to be a strange nest sitting on her backyard lounge.

"In this study, the nests are made by Sceliphron, which are wasps of the family Sphecidae, superfamily Apoidea. "These are well-known mud-daubers in much of the warmer parts of the world.