Anthony Fisher keeps a pet crow at his home in Devon. The crow is considered to be among the world’s most intelligent animals but they are rather noisy to keep owing to their harsh caw which can make their owner less than chirpy. In pairs they are aggressive and quarrelsome. Believed to have originated in central Asia, the crow is part of the corvus species which includes the chough, jackdaw, jay, nutcracker, magpie, raven and rook.