Grass-carrying Wasps (Isodontia spp.) build nests of grass in hollow plant stems, carpenter bee holes, and rock crevices. You may have also found one of these nests while cleaning your windows. Females build a nest during the summer and lay an egg within separate grass-lined cells. Each egg is provisioned with a comatose tree cricket or katydid that the female has stung. The wasp larva eats this insect after it emerges from the egg. As adults, they pollinate flowers such as goldenrod and mountai