Many subspecies...may
sometimes imitate the calls of
other birds such as drongos.
Aegithina tiphia
(L 4.7-5.7")
During the breeding season, males
display by fluffing up their feathers and
spiral in the air appearing like a green,
black, yellow and white ball.
(Wikipedia)
Aegintha is a mythical bird
mentioned by Aristotle, Pliny and
others; Iora is a feminine name
meaning
a birdlike woman.
(http://www.allbabynames.net/iora/)