Mud daubers are a type of wasp that has developed a particularly interesting nesting behavior — they grow their young in individual mounds and tunnel systems that they create out of mud.

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 ...

It makes a great shelter for adult mud crabs and the mud dauber wasp uses it to build its hut - Let us know your score in the comments below!