Қоңыр қаңқабас құсының сипаттамасы

Species of bird
Speciesbox
| fossil range = Middle Quaternary to recent
| image = Brown boobytern. JPG
| image caption = Male
| image2 = Weißbauchtoelpel. jpg
| image2 caption = Femaleboth S. l. plotus
| status = LC
| status system = IUCN3.1
| status ref =
| genus = Sula
| species = leucogaster
| authority = (Boddaert, 1783)
| range map = Sula leucogaster, verspreidingskaart met subspp, a. png
| range map caption = World range, It has a pantropical range, which overlaps with that of other booby species. The gregarious brown booby commutes and forages at low height over inshore waters. Flocks plunge dive to take small fish, especially when these are driven near the surface by their predators. They nest only on the ground, and roost on solid objects rather than the water surface. The bird was also illustrated in a hand coloured plate engraved by François Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle which was produced under the supervision of Edme Louis Daubenton to accompany Buffon's text. Buffon did not include a scientific name with his description but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name Pelecanus leucogaster in his catalogue of the Planches Enluminées. The type locality is Cayenne in French Guiana. The current genus Sula was introduced by the French zoologist Mathurin Jacques Brisson in 1760. The word Sula is Norwegian for a gannet; the specific leucogaster is from Ancient Greek leuko for "white" and gastēr for "belly". There are four recognised subspecies:
S. l. leucogaster (Boddaert, 1783) – Caribbean and Atlantic Islands
S. l. brewsteri Nathaniel Stickney Goss, 1888 – Pacific coasts of USA and Mexico
S. l. etesiaca Thayer & Bangs, 1905 – Pacific coasts of Central America and Colombia
S. l. plotus (Forster, JR, 1844) – Red Sea through the Indian Ocean to the west and central Pacific

The booby's head and upper body (back) is covered in dark brown to blackish plumage, with the remainder (belly) being a contrasting white. The bare part colours vary geographically, but not seasonally. Unlike other species of sulid, the juvenile plumage already resembles that of the adult. This bird nests in large colonies, laying two chalky blue eggs on the ground in a mound of broken shells and vegetation, but usually raises just one chick, the second one to hatch being unable to compete for food with its older sibling, or even ejected from the nest by it. It winters at sea over a wider area. Brown booby pairs may remain together over several seasons. They perform elaborate greeting rituals, and are also spectacular divers, plunging into the ocean at high speed. They eat mainly small fish (such as flying fish, mullet, halfbeaks, anchovies, goatfish, crowned squirrelfish and Indian mackerel
), squid (including the family Ommastrephidae) or shrimp which gather in groups near the surface and may catch leaping fish while skimming the surface. Along with plunge diving, some fledglings and some adults practice kleptoparasitism, where they steal prey from other seabirds. For example, brown boobies have been observed stealing prey from great frigatebirds as they transfer food to their young. Although they are powerful and agile fliers, they are particularly clumsy in takeoffs and landings; they use strong winds and high perches to assist their takeoffs.