Birds of the Pica race have long tail feathers, a feature inherited by the blue magpie too. It has four white-tipped tail feathers, of which the middle two can grow as long as 40 cm, accounting for 70 percent of the total body length. This is why bird-lovers call it the "long-tailed mountain maiden."
尤其鵲屬鳥種都有很長的尾羽，藍鵲也承襲此一傳統，四根末端白色的尾羽，中央兩根長可達四十公分，佔全身長度十分之七，因此又被賞鳥者稱為「長尾山娘」。