There is a Discworld joke about this. After being introduced to the God of evolution, God shows off the magnum opus he has been developing, the cockroach.

I read somewhere that some scientists now think there may be more species of wasps than beetles. Not least because many species of beetle seem to have a species of wasps that prey on them.

This is because when they would lay a sheet on the ground and shake the branches of a tree, they would often find more species of beetles than anything else. However, they may have been extrapolating a bit far from the few places they tried this.