However, solitary wasps such as the mud daubers do not defend their nest the way social wasps such as hornets and yellowjackets do. Mud daubers are very unlikely to sting, even when thoroughly aroused. They may sting if mishandled.
www.ipm.iastate.edu/ipm/iiin/bmuddaub.html www.ipm.iastate.edu/ipm/iiin/bmuddaub.html
A Mud Dauber wasp can sting, but it is unlikely to sting a human. Mud Daubers do not defend their nest like other wasps and do not attack humans even when provoked.
http://wiki.answers.com/Q/Will_a_mud_dauber_sting
Mud Dauber Wasp.doc (PDF File)
Can they sting? These questions are often asked when people see these wasps around their houses on a warm, sunny day. Their common name, Mud Dauber, ... The Mud Daubers in our area provision the nest with small spiders. It may take several weeks for the young wasp grub to grow to full size ready to pupate for the winter.
www.skagit.wsu.edu/MG/bugs/Mud%20Dauber%20Wasp.pdf www.skagit.wsu.edu/MG/bugs/Mud%20Dauber%20Wasp.pdf
Mud Daubers are Sphecid wasps that are solitary, not social as are honey bees, yellowjackets. These solitary wasps capture prey (spiders, bugs, other insects) which are placed into an individual cell. ... Seeing several cells does not mean you have a colony of mud daubers, since these wasps are not social insects.
www.pestproducts.com/muddauberwasps.htm www.pestproducts.com/muddauberwasps.htm
Mud-Daubers commonly build their mud nest in attics, porches, and carports and stockpile them with ... Consequently, their frequent trips from their "mud hole" to their nest and back again makes them quite obvious. Despite their conspicious flight path near our residences, they do not "attack" and sting humans.
www.ou.edu/oupd/permudd.htm www.ou.edu/oupd/permudd.htm
Wasp and Yellow Jacket Control using Delta Dust and Sniper ... But they can become aggressive and will sting when their nest is disturbed or threatened. ... Honey Bees, Yellow Jackets, Honey Bee Control, Hornets, Wasps, Cicada Killers, Mud Daubers, Bees, and Bumble Bee Sprays...
www.bugsaway.com/honeybee.htm
Cicada Killers, Paper Wasps, Yellow Jackets, Bumble Bees, Hornets, Wasps, Mud Daubers, Bees, and Bumble Bee Sprays ... Although capable of a painful sting, they are not aggressive and rarely come into contact with humans or pets. Sniper will give a quick knockdown of these and other wasps and bees.
www.bugsaway.com/cicadakiller.htm
INTRODUCTION. This group of wasps gets its common name from the fact that they construct their nest of mud. They are typically nuisance pests. Mud daubers are found throughout the United States. ... Mud daubers do not defend their nests, and only rarely sting.
www.greenvalleypc.com/html/wasp/mud.htm www.greenvalleypc.com/html/wasp/mud.htm
Solitary wasps (mud daubers, cicada killers, etc.) are not extremely aggressive and generally will not sting unless handled. Social wasps (yellow jackets, hornets, paper wasps) and social bees (honey bees) may readily sting to protect their nests and themselves.
www.gotchapest.com/pested/bees.htm
Solitary wasps (mud daubers) are very different than the social wasps (hornets, yellowjackets and paper wasps). There is no worker caste and the queens must care for their own young. Mud dauber wasp queens use their sting to paralyze their prey (spiders) rather than to defend their nests.
ohioline.osu.edu/hyg-fact/2000/2078.html