Say 'cuckoo' and a finch-sized bird popping out of a wooden clock every hour probably comes to mind. But, at between 58 and 65 cm tall, with a piercing stare, channel-billed cuckoos are the world's ...

Generally shy and elusive, the yellow-billed cuckoo can be easily overlooked. Its calls are usually loud and often provide the best evidence to the presence of the bird. It favors eating caterpillars ...