Black and yellow mud dauber
Jeff Hahn, University of Minnesota Extension
Howard Ensign Evans, Colorado State University, Bugwood.org
Size: 3/4 - 1 inch long
Description: Black with mostly yellow legs and yellow markings on its thorax.
Where/When: Construct small nests of mud under overhangs like eaves of buildings. Found around flowers, gardens and mud puddles, and buildings and other sites where they construct their nests; found June through August.
Significance: Not aggressive, stings are rare. Does not harm buildings where they build their nests.