It is an Owlet moth, a member of one of largest moth families around the world. Twenty five percent of all moths come from this family and this particular species is found all over the North American continent.
Like most moths, they are nocturnal and are most active at night, but some activity in the daytime isn't uncommon. They are also attracted to lights. Adults are active from late summer to fall, not minding the cooler weather.
The larvae of this species are known to be a terrible agricultural pest. They feed on popular produce like apples, corn, beans (including soybeans) and tobacco. These crops can be decimated, eaten (or 'cut') down to ground level, and the loss of revenue can be astounding.