Mud dauber (or “dirt dauber” in the southern U.S.) is a name commonly applied to a number of wasps from either the family Sphecidae or Crabronidae that build their nests from mud.
These are usually found on our porch ceiling. Nasty homes, that are very hard to clean. Even though the Mud Dauber looks like a wasp, it is harmless. Does not sting.
Below you will find a photo of what is inside a Mud Dauber’s home. I had been watching a very busy Mud Dauber on my front porch one day, and I decided I had to see what was inside. I knocked down the home into a plastic ziplock bag. While it was in there, one of the eggs hatched! It was exciting to see.
The top yellow is an underdeveloped Mud Dauber. Next is a spider used to feed the larva, which you can see at the bottom of the photo. The brown tube is a cocoon.
For more information go to:
Commond Mud Dauber This site gives you a detail journal of the development of the wasp larva. Loads of wonderful pictures. Much better than mine.
Texas Cooperative Extension Not too much information here. I tried to find something in Florida, but couldn’t.