Mud dauber wasps (likely blue mud daubers)

Found around buildings, wooden structures, sheltered eaves, and other dry sites where mud nests can be attached.

Adults feed mainly on nectar and other sugary fluids; females provision nests with paralyzed spiders for their larvae.

Generally solitary and nonaggressive, with females constructing or reusing mud cells. They hunt spiders, sting them into paralysis, and seal them inside cells with an egg.

They rarely sting unless handled and are not considered major structural pests. They benefit gardens by pollinating flowers and reducing spider populations.