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Black and yellow mud dauber is a common name for the sphecid wasp species Sceliphron caementarium. They are solitary insects that build nests out of mud, in sheltered locations, frequently on man-made structure such as bridges, barns, open porches or under the eaves of houses. These nests are not aggressively defended, and stings are rare.

S. caementarium is widespread in Canada, the United States, Central America, South Africa and the West Indies, and has been introduced to many Pacific Islands (including Australia, Hawaii and Japan), Peru and Europe, where it has become established in the western Mediterranean Basin.

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