Book excerpt: Who knew that the morepork, our forest-dwelling owl, can turn its head 270 degrees? Or that the eastern bar-tailed godwit doubles its body weight before undertaking an epic and continuous migration of 11,000 kilometres? Or that the tui has a specially placed voicebox, enabling it to duet with itself, sometimes producing sounds too high-frequency for humans to hear? Zany, off-kilter, wondrous and wild, The Brilliance of Birds gives a behind-the-scenes glimpse into the lives of some of New Zealand's feathered friends.