Allen's gallinule (''Porphyrio alleni''), formerly known as the lesser gallinule, is a small waterbird of the family Rallidae. Its former binomial name is ''Porphyrula alleni''. ''Porphyrio'' is the

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

for "swamphen", and ''alleni'', like the English name, commemorates British naval officer Rear-Admiral

William Allen William Allen may refer to: Politicians United States *William Allen (congressman) (1827–1881), United States Representative from Ohio *William Allen (governor) (1803–1879), U.S. Representative, Senator, and 31st Governor of Ohio *William ...

(1792–1864). Its breeding habitat is marshes and lakes in

Sub-Saharan Africa Sub-Saharan Africa is, geographically, the area and regions of the continent of Africa that lies south of the Sahara. These include West Africa, East Africa, Central Africa, and Southern Africa. Geopolitically, in addition to the List of sov ...

. They build a floating nest in marshes and swamps, laying 2–5

egg An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the a ...

s. This species is partially migratory, undertaking seasonal movements. Remarkably, this apparently weakly flying bird is not only the only species with a purely sub-Saharan African range to have reached

Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...

, but has done so twice. It has also occurred as a vagrant in several other

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

an countries. They are similar in size to the only slightly larger

water rail The water rail (''Rallus aquaticus'') is a bird of the Rallidae, rail family which breeds in well-vegetated wetlands across Europe, Asia and North Africa. Northern and eastern populations are bird migration, migratory, but this species is a perma ...

. The Allen's gallinule has a short red bill, greenish back and purple upperparts. They have red legs with long toes, and a short tail which is white with a dark central bar underneath. Breeding males have a blue

frontal shield A frontal shield, also known as a facial shield or frontal plate, is a feature of the anatomy of several bird species. Located just above the upper mandible, and protruding along the forehead, it is composed of two main parts: a hard, proteinaceo ...

, which is green in the female. Immature Allen's gallinules are sandy brown with a buff undertail. The downy chicks are black, as with all

rails Rail or rails may refer to: Rail transport *Rail transport and related matters *Rail (rail transport) or railway lines, the running surface of a railway Arts and media Film * ''Rails'' (film), a 1929 Italian film by Mario Camerini * ''Rail'' ( ...

. These birds probe with their bill in mud or shallow water, also picking up food by sight. They mainly eat

insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...

s and aquatic animals. They nod their heads as they swim. Allen's gallinules are very secretive in the breeding season, particularly in the dense swamps they favour, and are mostly heard rather than seen. They are then rather noisy birds, with a sharp nasal ''pruk'' call. They can be easier to see on migration or when wintering.

References

External links

* (Allen's gallinule = ) lesser gallinule
Species text in The Atlas of Southern African Birds
{{Taxonbar, from=Q746632 Allen's gallinule Birds of the Comoros Birds of Sub-Saharan Africa Allen's gallinule