No they do not.
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.
Mud dauber wasp only has one predator and that is the bird.
Blue mud dauber was created in 1867.
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]
a wasp
Most bees are not aggressive. Hornets and wasps are aggressive. If you have hornets, avoid that area or spray them.
Wasps are more dangerous. Wasps are long and thin while bees are small and normal sized. Wasps don't die when they sting, bees do. In addition: Although both species drink nectar from flowers, wasps could be said to be carnivorous, while bees are not. Bees feed their young with pollen collected from flowers while wasps feed their young on insect or spider prey.
Natural enemies are the blue mud dauber and the spider wasp.
The steel blue cricket killer is much more colorful as well as quite a bit larger than the mud dauber. The steel blue cricket killer also has less hair even though the males of this species is very difficult to differentiate.
If you are allergic to blue mud dauber wasp stings, seek medical attention immediately. Call emergency services and inform them of your allergy and the situation. Follow any recommendations given by medical professionals to manage the allergic reaction.
yes
Yes - there are many types of wasps in California including: German yellowjacket, western yellowjacket, California yellowjacket, paper wasp, mud dauber, fig wasp, Western sand wasp, square headed wasp, bee wolf, Pacific burrowing wasp, gall wasp, soldier wasp, club horned wasp, burrowing wasp, blue mud wasp, cutworm wasp, thread-waisted wasp, mason wasp, potter wasp, and pollen wasp. Obviously this is not a complete list - just scratching the surface really - but it does demonstrate that California has plenty of wasps.