Clinging to a wild parsnip stem. The sound of this insect is the quintessential sound of summer, often coming from high up in the treetops.

Bug Guide notes the following:

"DOG-DAY: a reference to the hot "dog days" of late summer when this species is heard singing; at this time in the northern hemisphere the Dog Star (Sirius) is above the horizon in the Big Dog constellation (Canis Major).

NOTE: Dog-days of summer indeed do refer to Sirius, the dog star, and although it is above the horizon, it is not visible in summer in the northern hemisphere. This is because it is up during the daytime. Canis major is a "winter" constellation.
Canis Major"