Tweet of the Day is the voice of birds and our relationship with them, from around the world.

Miranda Krestovnikoff presents the New Zealand brown kiwi. A piercing wail can be heard in a forest at night. A brown kiwi is calling. Only found in New Zealand, kiwi are flightless birds and the brown kiwi, which is about the size of a domestic chicken, lays an egg weighing as much as a quarter of its own bodyweight – proportionally; the largest egg for its size of any bird. More mammal like than birds; their tiny eyes are of little use, but they have an excellent sense of smell, using their nostrils located unusually for birds near the end of the bill. Held in great affection, brown kiwi appear on coins, stamps and coats-of- arms as well as providing a nick-name for New Zealand's national rugby team.

Producer: Andrew Dawes Show less