Brown Booby
A species of Boobies Scientific name : Sula leucogaster Genus : Boobies
Brown Booby, A species of Boobies
Botanical name: Sula leucogaster
Genus: Boobies
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Description People often ask General Info
Photo By silversea_starsong , used under CC-BY-NC-4.0 /Cropped and compressed from original 
Description
The booby's head and upper body (back) is covered in dark brown to black plumage, with the remainder (belly) being a contrasting white. The bare part colours vary geographically, but not seasonally. The species also displays sexual dimorphism of the bare part colours, the males having a blue orbital ring, as opposed to the yellow orbital ring of the female. In addition the male of subspecies S. l. brewsteri is distinctly plumaged in having the forehead, forecrown and chin white, merging to a greyish brown neck and breast. The female booby reaches about 80 centimetres (31 in) in length, her wingspan measures up to 150 cm (4.9 ft), and she can weigh up to 1,300 g (2.9 lb). The male booby reaches about 75 centimetres (30 in) in length, his wingspan measures up to 140 cm (4.6 ft), and he can weigh up to 1,000 g (2.2 lb). Unlike other species of sulid the juvenile plumage already resembles that of the adult. They are gray-brown with darkening on the head, upper surfaces of the wings and tail, while the lower breast and underpart plumages are heavily flecked brown on white. Juveniles of subspecies S. l. brewsteri are once again distinct in having the underpart plumage more evenly mouse brown. Their beaks are quite sharp and contain many jagged edges. They have fairly short wings resulting in a fast flap rate, but long, tapered tails. While these birds are typically silent, bird watchers have reported occasional sounds similar to grunting or quacking. 
Size
66-74 cm (26-29 in)
Colors
Brown
Black
White
Life Expectancy
24 years
Nest Placement
Ground
Clutch Size
1 - 3 eggs
Incubation Period
1 brood
Number of Broods
42 - 45 days
Feeding Habits
Brown Booby's diet consists mainly of various fish and squid. They showcase acrobatic diving, even skim-plunging, to capture prey, quickly swallowing it post-dive. They can feed solo, in flocks, or with other species, often trailing boats or fish like tuna that push prey upwards.
Habitat
Brown Booby thrive in tropical marine environments, mostly nesting on predator-free islands in sites like sandy beaches or rocky cliffs. They inhabit sea-level altitudes within warm climates, including hillsides or island terrain for nesting. At sea, brown Booby perch on buoys or jetties, especially where ocean currents meet or upwell, aiding foraging. Occasionally, brown Booby may frequent freshwater areas, contingent on food availability.
Nest Behavior
During nesting, males of brown Booby select the site, and both parents construct the nest.
Nest Characteristics
Brown Booby's nest is typically located on flat, sparsely vegetated terrain. It is constructed from available materials like branches, grass, feathers, bird bones, or trash, measuring 12-18 inches wide with a 7-inch-wide interior cup and 2.5 inches deep. Some nests may consist of minimal vegetation.
Dite type
Piscivorous
People often ask
General Info
Feeding Habits
Bird food type
Behavior
Brown Booby are known for a complex mating ritual where the male exhibits a 'parading' display to secure nesting territory. After a mate is found, both engage in stylized movements and 'mutual allopreening'. They share nesting and rearing duties, performing bill-touching and bowing in greetings. Mating includes display that mimics nest-weaving. They often reuse nests and mates in subsequent seasons. Brown Booby ardently defend their territory with displays and, if needed, physical altercations.
Species Status
Not globally threatened.
Scientific Classification
Phylum
Chordates Class
Birds Order
Gannets and Relatives Family
Sulids Genus
Boobies Species
Brown Booby 
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