Acronicta grisea, commonly known as the gray dagger moth, is a species of moth belonging to the family Noctuidae. It is found in North America, particularly in the eastern and central regions. The adult moth has a wingspan of about 3-4 centimeters and is characterized by its grayish-brown coloration and distinct dagger-shaped markings on its forewings. The larvae of Acronicta grisea are known to feed on a variety of deciduous trees, making them an important species in forest ecosystems.