ubiquitous Pacific ecosystem for its size. The most conspicuous plants of the boglands are the arum Cyrtosperma merkusii and the giant bulrush (Schoenoplectus californicus). Among the local crops, sugar-apple (Annona squamosa), breadfruit (Artocarpus altilis), papaya (Carica papaya), bananas (Musa cultivars, including Fe'i bananas) and apple guava (Psidium guajava) are the most significant, apart from the coconuts. Frangipani (Plumeria) and hibiscus are popular as ornamental plants. Birds Though numerous seabirds nest on Teraina, for many such species the limited habitat makes it a less important rookery than other, similar-sized raised atolls. About 10 species of seabirds breed here, most significantly tree-nesters like the little white tern (Gygis microrhyncha) and the red-footed booby (Sula sula). The eastern reef egret (Egretta sacra), widespread throughout the region, can also be found on Teraina. Among migratory birds, the ruddy turnstone (Arenaria interpres), sanderling (Calidris alba), bristle-thighed curlew (Numenius tahitiensis), Pacific golden plover (Pluvialis fulva), and grey-tailed (Tringa brevipes) and wandering tattlers (T. incana) use Teraina as stopover location or winter quarters on a regular basis. Other shorebirds, gulls, and occasionally ducks of North American and East Asian species may occur as vagrants. In historic times, two species of landbirds and one subspecies of duck have been recorded. The latter, Coues's gadwall (Anas strepera couesi), was the only distinct subspecies of the widespread gadwall. It is surrounded by considerable mystery, mainly as regards the origin of the population, the age and therefore validity of the subspecies (it is sometimes disputed to be significantly distinct), and the causes and date of its disappearance. Only two specimens are known – a couple that is not fully mature, and therefore only limited information can be gleaned from it. What is certain is that there was a duck population of some size in the mid-1870s, while in 1900 all were gone. The bokikokiko (Acrocephalus aequinoctialis) is Kiribati's endemic reed-warbler. This small greyish passerine is well-known, due to its bold and inquisitive habits, and its song, a series of alternating higher and lower squeaks after which it is named. The Rimitara lorikeet (Vini kuhlii) is present with about 1,000 birds. It is a tiny parrot with brilliant plumage and an endearing and highly social behavior, owing to which they were known to late 19th century settlers as "love-birds". This species was originally native to the Austral and Cook Islands in SE Polynesia, a long distance to the south. They were treasured