Lowland kagu

The **lowland kagu** (*Rhynochetos orarius*) is a species of large kagu native to to the lowland forests of New Caledonia. The lowland kagu was once extinct, but has since been brought back from extinction by SciiFii and reintroduced throughout the species' former range. The lowland kagu is very similar to the closely-related highland kagu (*Rhynochetos jubatus*), also known as the mountain kagu, but is about 15% larger and has a more pale-colored legs and beak. There is little sexual dimorphism beyond a difference in the amount of barring in the primary feathers. It possesses powder down which helps keep it dry and insulates it in the extremes of New Caledonia's tropical climate. The crest, which is used to display to other members of the species, is barely noticeable when at rest but can be erected and fanned out. It is nearly flightless, using its wings for displays (its primary wing feathers are patterned), and for moving quickly through the forest. It can also use them to glide when fleeing danger. The wings are not reduced in size like some other flightless birds, but they lack the musculature for flight. It possesses strong, long legs, enabling the bird to travel long distances on foot and run quickly. It has large eyes, positioned so that they give good binocular vision which is helpful in finding prey in the leaf litter and seeing in the gloom of the forest. It possesses 'nasal corns', structures covering its nostrils, which are a feature not shared by any other bird. These are presumed to prevent particles entering the nostrils when probing in soil during feeding. Another unique characteristic of the species is that it has only one-third as many red blood cells and three times more hemoglobin per red blood cell than is usual in birds. The lowland kagu is exclusively carnivorous, feeding on a variety of animals with annelid worms, snails and lizards being amongst the most important prey items. Also taken are larvae, spiders, centipedes and insects such as grasshoppers, bugs, and beetles. The majority of the diet is obtained from the leaf litter or soil, with other prey items found in vegetation, old logs and rocks. Sometimes kagus will hunt small animals in shallow water. Their hunting technique is to stand motionless on the ground or from an elevated perch, and silently watch for moving prey. They may stand on one foot and gently move the leaf litter with the other foot in order to flush prey. Having located prey they will move towards the prey and stand over it, ready to strike, or make a dash towards the prey from their watching location. If digging is required to obtain the prey this is done with the bill, the feet are not used to dig or scratch away debris. Lowland kagu are territorial, maintaining year-round territories of around 10–28 hectares (25–69 acres). Within the territory the pairs are solitary during the non-breeding season, and may have separate but overlapping foraging areas. Lowland kagus make a range of different sounds, most commonly while duetting in the morning, each duet lasting about 15 minutes. The lowland kagu's crest and wings are used in territorial displays towards other lowland kagu, slightly different displays are used towards potential predators. Territorial disputes may be resolved by fighting using wings and bills, in the wild this seldom results in serious injuries. Lowland kagus are monogamous breeders, generally forming long-term pair bonds that are maintained for many years, even possibly life. Lowland kagu can be long lived, with birds in captivity living for over 20 years. A single nesting attempt is made each year, although should the first nesting attempt fail a second attempt is made that year. A simple nest is constructed, which is little more than a heaped pile of leaves, although in some cases the egg may be laid directly on the ground. The nest is not concealed but is usually adjacent to a tree trunk, log or low vegetation. A single grey slightly blotched egg is laid which weighs 60–75 grams. Incubation duties are shared by the parents. Each bird will incubate the egg for 24 hours, with the changeover occurring around noon each day. During each incubation stint the parent will remain on the egg the whole time except early in the morning, when the bird will briefly move away to call to its mate and occasionally forage quickly. The incubation period lasts for 33–37 days, which is long for the size of the egg. Offspring may remain in their parents' territory for many years after fledging, sometimes up to six years. These chicks do not help in incubating the eggs or raising the chicks, but nevertheless improve the breeding success of the parents. The older offspring do apparently help in territory defence, responding to playback of rivals and also participating in territorial fights, and it has been suggested that this should be treated as a form of cooperative breeding. The conservation status of the lowland kagu is **Vulnerable** due to some habitat loss and, historically, overhunting and invasive species, however, thanks to the conservationists, the invasive predators and egg-eating animals have been eradicated from New Caledonia and the lowland kagu is a protected species.