The Eurasian Jay is a species of bird occurring over a vast region from Western Europe and north-west Africa to the Indian Subcontinent and further to the eastern seaboard of Asia and down into south-east Asia. Across its vast range, several very distinct racial forms have evolved to look very different from each other, especially when forms at the extremes of its range are compared.The bird is called jay, without any epithets, by English speakers in Great Britain and Ireland. It is the original 'jay' after which all others are named.The Eurasian Jay was one of the many species originally described by Linnaeus in his 18th century work Systema Naturae. He recognised its affinity with other corvids, naming it Corvus glandarius.Eight racial groups are recognised by Madge & Burn the nominate group with a streaked crown.The cervicalis group with a rufous nape, grey mantle, very pale head sides, and a streaked or black crown the atricapillus group with a uniform mantle & nape, black crown and very pale face.the race hyrcanus small with black forecrown and broadly-streaked hindcrown.the brandtii groupwith a streaked crown, reddish head, dark iris and grey mantle.
the leucotis group with no white in the wing, a white forecrown, black hindcrown and much white on the sides of the head.