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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 ...
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.
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 ...
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
Tràm Chim National Park (Vietnamese: Vườn quốc gia Tràm Chim) is a national park in the Plain of Reeds in the Mekong Delta region of Vietnam.The park was created to restore a degraded wetland, in order to protect several rare birds, especially the sarus crane (Grus antigone sharpii)--a species listed on the IUCN Red List.
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.
Thổ Chu Island - the largest entity of the archipelago - was first proposed as a marine protected area in 1995. Subsequently, Asian Development Bank proposed the establishment of a marine protected areas over Thổ Chu Island with an area of 22,400 hectares (86 sq mi), of which land area is 1,190 ha (4.6 sq mi) and sea area is 21,210 ha (81.9 sq mi).