Life cycle: A female lays an egg inside a small mud nest she has built attached to a twig or other stable structure. She provisions the nest with small caterpillars which the larva eats as it grows and develops. It emerges from the nest as an adult.
There are two or three generations of potter wasps a year, depending upon location. The final generation of the year overwinters inside the nest and emerges the following spring. (For photos of larva inside a mud nest, see here.
Range: Eastern and central US to the Rockies and Canada from Nova Scotia to Alberta.
Food: Larvae feed on leaves of many trees and shrubs but particularly members of the rose family such as apple, cherry, and crabapple.
Life Cycle: In the fall, a female lays an eggs mass on a twig where it overwinters. The larvae hatch in the spring. They construct a tent of webbing in which the feed and grow. Eventually, the caterpillars will disburse and pupate.