mud daubers are predators.Black and yellow mud daubers primarily prey on relatively small, colorful Spiders, such as crab spiders (and related groups), orb weavers and some jumping spiders. They usually find them in and around vegetation. Blue mud daubers are the main predator of the black and brown widow spiders. To capture a spider, the wasp grabs it and stings it into submission. The venom from the sting does not kill the spider, but paralyzes and preserves it so it can be transported and stored in the nest cell until consumed by the larva. [So no , it doesn't kill humans]
No they do not.
I have been stung by a mud dauber and a yellow jacket. The mud dauber sting is more like a needle prick than a sting. The yellow jacket sting hurt a lot worse... I would think, based on my own reaction, that the venom is different.
The structure you are referring to is likely a mud dauber wasp nest. Mud dauber wasps use mud to create nests, which are typically small, cylindrical structures attached to walls or other surfaces. The nests can be mistaken for tiny mud homes.
Blue mud dauber was created in 1867.
Yes, I have encountered a mud dauber in my house.
Organ pipe mud dauber was created in 1773.
Blue mud dauber wasps are generally not aggressive towards humans and their sting is usually not harmful to people unless they are allergic. In rare cases, multiple stings could potentially lead to complications, but it is very unlikely that a blue mud dauber wasp would cause a fatal reaction in a healthy individual.
There are actually several different things you can use to treat a mud dauber sting or bite. You can use baking soda to draw the poison out or you can place wet tobacco over it to stop the burning sensation.
a wasp
The mud dauber nest is one of the most complex insect nests in existence. It only takes 3 weeks to build a mud dauber nest, fill it with food, and lay the eggs that will hatch in the spring.
Mud dauber nests are made of mud and are typically found in sheltered areas. They are important in the ecosystem as they provide homes for the larvae of mud dauber wasps. These nests also help control insect populations as the wasps feed on spiders and other insects.
Mud dauber wasp only has one predator and that is the bird.