Is there any bird more mysterious than the cuckoo? It is invariably heard, and not seen. And if seen, it is mistaken for a sharp-winged hawk. The female cuckoo – by a trick that borders on alchemy – is able to disguise its egg as another’s. In Greek myth the god Zeus assumed the form of a cuckoo to seduce Hera. But we forgive the cuckoo its con-artistry, because it is the true herald of spring. It is the bird that uplifts our wintered hearts, with that first two-note ‘cuk-koo’ unmistakable as it sounds across the country. John Lewis-Stempel explains one of nature’s greatest enigmas in vivid, lyrical prose, and celebrates this iconic bird.