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Bird measurement or bird biometrics are approaches to quantify the size of birds in scientific studies. The variation in dimensions and weights across birds is one of the fundamental sources of diversity among birds, and even Within species, dimensions may vary across populations within species , between the sexes and depending on age and ...
Originally, many thước of varying lengths were in use in Vietnam, each used for different purposes. According to Hoàng Phê (1988), [1] the traditional system of units had at least two thước of different lengths before 1890, [2] the thước ta (lit. "our ruler") or thước mộc ("wooden ruler"), equal to 0.425 metres (1 ft 4.7 in), and the thước đo vải ("ruler for measuring ...
The scales of birds are composed of the same keratin as beaks, claws, and spurs. They are found mainly on the toes and metatarsus, but may be found further up on the ankle in some birds. Most bird scales do not overlap significantly, except in the cases of kingfishers and woodpeckers.
This is a list of the bird species recorded in Vietnam.The avifauna of Vietnam include a total of 963 species, of which 18 are endemic, and 5 have been introduced.. This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist of Birds of the World, 2022 edition.
Lạc bird (Vietnamese: chim Lạc, Lạc điểu, Chinese: 雒鳥) [1] is a mythical creature in Vietnamese culture and a national bird of Vietnam. [ 2 ] [ 3 ] [ 4 ] Appearance
Bird anatomy, or the physiological structure of birds' bodies, shows many unique adaptations, mostly aiding flight.Birds have a light skeletal system and light but powerful musculature which, along with circulatory and respiratory systems capable of very high metabolic rates and oxygen supply, permit the bird to fly.
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As a migratory bird habitat, it is a staging and wintering area for shorebirds, gulls and waterfowl in the coastal zone of the Red River Delta. Some of the popular bird species in the park are the Asian dowitcher , Nordmann's greenshank , spoon-billed sandpiper , Saunders's gull and black-faced spoonbill .