The various species of _Spizaëtus_, _Limnaëtus_, _Lophotriorchis_, _Lophoaëtus_, _Neopus_, and _Nisaëtus_, with comparatively short wings, long tails, and large claws, are sometimes denominated Hawk-Eagles. Not usually shy, they are essentially denizens of wooded country, where some prefer the hilly districts, others the neighbourhood of streams; the food is extremely varied, including in different cases, monkeys, bucks, lambs, goats, hares, rabbits, birds as large as bustards and geese, lizards, frogs, or even fish; while the flight is more graceful and Falcon-like than in the genus _Aquila_, the note clearer and sharper. The moderately large nest is composed of sticks, and usually lined with green leaves or branchlets; the one or two eggs are white, ordinarily with light reddish-brown markings. _Spizaëtus coronatus_ of South and West Africa is blackish above, with a little white on the tail-coverts and remiges, and brownish tips to the triply-barred rectrices, the buff lower parts being broadly banded with black. _S. tyrannus_, extending from Guatemala to Brazil, is black beneath; _S. ornatus_, of Central and South America as far as Paraguay, has the nape and sides of the neck and chest tawny. These birds have an occipital crest, as have some members of the hardly separable _Limnaëtus_, of which _L. caligatus_, of India and the Malay countries, deep brown in colour, with ashy inner webs to the remiges, will serve as an example. _L. nipalensis_ and _L. cirrhatus_ inhabit India with Ceylon, and the former Formosa and Japan; _L. philippensis_ the Philippines; _L. alboniger_ Malacca and Borneo; _L. lanceolatus_ Celebes and the Sula Islands; _L. gurneyi_ New Guinea and the Moluccas; _L._ (_Lophotriorchis_) _kieneri_ India, Malacca, Borneo, and Batchian; _L. isidori_ north-western South America. _Lophoaëtus occipitalis_, of Africa south of the Sahara, is brown, except for a few white marks above, and has shortly-feathered white metatarsi. {161}Here the crest is extremely long, but in the nearly black _Neopus malayensis_, ranging from India to the Moluccas, it is much shorter. _Spiziastur melanoleucus_, extending from Guatemala to Brazil, is brownish-black, with white head, neck, and lower surface, the tail has four darker bands, and black marks shew towards the crest. In this species the inner claw and hallux are greatly developed. _Nisaëtus pennatus_, the "Booted Eagle" of South Europe, Africa, and thence to India and Ceylon, so called from the feathered legs, is brown above, with a white shoulder-patch, white tip to the barred tail, and various buffish markings; the head, neck, and under parts are fawn-coloured, with brown streaks except on the abdomen. _N. fasciatus_, Bonelli's Eagle, has a similar range, but reaches China, and not South Africa; it lacks the shoulder-patch, but is streaked on the abdomen. _N. morphnoïdes_ inhabits Australia and New Guinea, _N. spilogaster_ and _N. bellicosus_ Southern