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The flying geese paradigm (Japanese: 雁行形態論, Hepburn: Gankō keitai-ron) is a view of Japanese scholars regarding technological development in Southeast Asia which sees Japan as a leading power. It was developed in the 1930s, but gained wider popularity in the 1960s, after its author, Kaname Akamatsu, published his ideas in the Journal ...
Eurasian cranes in a V formation (video) Birds flying in V formation. A V formation is a symmetric V- or chevron-shaped flight formation.In nature, it occurs among geese, swans, ducks, and other migratory birds, improving their energy efficiency, while in human aviation, it is used mostly in military aviation, air shows, and occasionally commercial aviation.
[3] Swarm behaviour was first simulated on a computer in 1986 with the simulation program boids. [4] This program simulates simple agents (boids) that are allowed to move according to a set of basic rules. The model was originally designed to mimic the flocking behaviour of birds, but it can be applied also to schooling fish and other swarming ...
The male Canada goose usually weighs 2.6–6.5 kg (5 + 3 ⁄ 4 – 14 + 1 ⁄ 4 lb), averaging amongst all subspecies 3.9 kg (8 + 1 ⁄ 2 lb). The female looks virtually identical, but is slightly lighter at 2.4–5.5 kg ( 5 + 1 ⁄ 4 – 12 + 1 ⁄ 4 lb), averaging amongst all subspecies 3.6 kg (8 lb), and generally 10% smaller in linear ...
Greater white-fronted geese are 64–81 cm (25–32 in) in length, have a 130–165 cm (51–65 in) wingspan, and weigh 1.93–3.31 kg (4 lb 4 oz – 7 lb 5 oz). [4] [5] They have bright orange legs and mouse-coloured upper wing-coverts. They are smaller than greylag geese. As well as being larger than the lesser white-fronted goose, the ...
Geese have also been strongly selected for fecundity, with females laying up to 500 eggs per year, compared to 5–12 eggs for a wild goose. [3] [5] As most domestic geese display little sexual dimorphism, sexing is based primarily on physical characteristics and behaviour. Males are typically taller and larger than females, and have longer ...
The bird is pale grey and is easily distinguished from any of the other grey geese of the genus Anser by the black bars on its head. It is also much paler than the other geese in this genus. In flight, its call is a typical goose honking. A mid-sized goose, it measures 71–76 cm (28–30 in) in total length and weighs 1.87–3.2 kg (4.1–7.1 lb).
The duration of individual stints varies from just a few days to as much as several weeks, during which the incubating bird can lose a considerable amount of weight. [71] The incubation period varies from species to species, around 40 days for the smallest storm-petrels but longer for the largest species; for albatrosses it can span 70 to 80 ...