HAMMER-KOP or HAMMERHEAD (Scopus um bretta), an African bird, put in a family, Scopidae, between the shoe-bills and storks. It inhabits nearly the whole of Africa and Madagascar, frequenting wooded districts. Though not larger than a raven, it builds a nest some six feet in diameter, with a flat-topped roof and a small hole for entrance and exit, placed on a tree or a rocky ledge. In this it lays three to five white eggs. The bird, of brown colour, slightly glossed with purple and its tail barred with black, has a long crest, generally borne horizon tally, and that has given rise to its common name. It is also called the tufted umbre, or in French umbrette, from the almost uniform earthy brown (umber) colour of the plumage. The bird stands beside a stream, with head drawn in like a heron, watching for fish or frogs.