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 wing from mid-June to mid-July in Canada. In the northern part of the range, there is one generation with adults on wing from may to July. Farther south, there might be two generations per year.

The larvae feed on poplar, willow and cottonwood species.