Pachysphinx modesta

Pachysphinx modesta, the modest sphinx or poplar sphinx, is a moth of the family Sphingidae. The species was first described by Thaddeus William Harris in 1839.

Distribution

It ranges from the southern United States up and throughout Canada.

Biology

Adults are on the wing from mid-June to mid-July in Canada. In the northern part of the range, there is a single generation, with adults active from May to July. Further south, there may be two generations per year.
The larvae feed on species of poplar, willow, and cottonwood.