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Jays are medium-sized, colorful, and noisy birds that belong to the crow family, corvidae. There are about 30 to 45 species of jays globally, and 12 of these can be found in north america. Jay, any of about 35 to 40 bird species belonging to the family corvidae (order passeriformes) that inhabit woodlands and are known for their bold, raucous manner.

Although the term jay carries no taxonomic weight, most or all of the birds referred to as jays share a few. Blue jays are known for their intelligence and complex social systems with tight family bonds. Their fondness for acorns is credited with helping spread oak trees after the last glacial period.