Black and yellow mud dauber wasp
The black and yellow mud dauber (Sceliphron caementarium) is one of several mud dauber wasps. They’re large, quite common, and get their name from the mud nests they build. These nests are often attached to man-made structures, such as under the eaves of houses. They’re not aggressive, but are prone to startling me since they spend a good deal of time around the outside of the house.