Genus Perisoreus refers to a group of bird species that belongs to the corvid family. These birds are commonly known as jays and are native to the Northern Hemisphere. There are two species in the genus Perisoreus; the gray jay and the Siberian jay. These birds are also known as Canada jays, whiskey jacks, or camp robbers. Gray jays are known for their foraging behavior and their preference for coniferous forests. Siberian jays, on the other hand, are found in the boreal forests of Russia and neighboring countries. Overall, the genus Perisoreus is known for its intelligence, resourcefulness, and adaptability to harsh environments.