With its vivid plumage of red, yellow and blue, the brightly coloured scarlet macaw is one of the most spectacular parrots in the world. It is also the biggest, measuring as long as 33 inches (84cm) from beak to tail. With a strong beak perfect for cracking open nuts, it forages in forests from southern Mexico to Peru. Sadly, its striking appearance has made it a target for the illegal pet trade, with smuggled baby macaws fetching as much as £3,100 ($4,000).