Earlier in summer, dogwood shrubs, mostly red-osier dogwoods, are festooned with little white foamy globs. This is the "spittle" of the dogwood spittlebug nymph. Eventually the adults appear and can be seen quite commonly on dogwood shrubs. There are other species in this genus that look somewhat similar, such as the alder spittlebug, C. obtusa, not to be confused with another spittlebug called alder spittlebug (or more correctly, European alder spittlebug) in the genus Aphrophora.