Most measurement requires the use of calipers. Here, the measurement of length, wing, tail, tarsus, and two forms of culmen measurement are shown.
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 condition. For measurements to be useful, they must be well-defined to be consistent and comparable with those taken by others or at other points in time. Measurements can be useful to identify species, quantify functional and ecomorphological differences, study growth, variation between geographically separated forms, identify differences between the sexes, age or otherwise characterize individual birds. While certain measurements are regularly taken to study living birds, others apply only to specimens in bird collections or are measurable only in the laboratory. The conventions used for measurement can vary between authors and works, making comparisons of sizes a matter that needs considerable care.[1]
^Baldwin, S. Prentiss; Oberholser, Harry C.; Worley, Leonard G. (1931). "Measurements of birds". Scientific Publications of the Cleveland Museum of Natural History. 2: 1–165.
Birdmeasurement or bird biometrics are approaches to quantify the size of birds in scientific studies. The variation in dimensions and weights across...
as the fastest bird in level flight with a reported top speed of 169 km/h (105 mph). This record remains unconfirmed as the measurement methods have never...
Birdbrain or bird brain may refer to: Bird brain, the brain of a bird, including the Avian pallium Bird intelligence, intelligence and its measurement as it...
centimetres (45 in) according to Stonehouse (1975). Due to method of birdmeasurement that measures length between bill to tail, sometimes body length and...
The largest extant species of bird measured by mass is the common ostrich (Struthio camelus), closely followed by the Somali ostrich (Struthio molybdophanes)...
helps in keeping track of the movements of the bird and its life history. It is common to take measurements and examine conditions of feather molt, subcutaneous...
Bird migration is birds’ regular and annual seasonal journey between their breeding and wintering grounds. Birds that migrate usually travel along north...
showing body length (length between tip of beak and tip of tail, see birdmeasurement), not standing height. Body length and standing height of penguins...
Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With approximately 366 species and 113 genera, they occur...
Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family Accipitridae. Eagles belong to several groups of genera...
cryptic species, measurements (such as the relative lengths of wing feathers in warblers) are vital in establishing identity. Captured birds are often marked...
occasional vagrants are found. Great albatrosses are among the largest of flying birds, with wingspans reaching up to 2.5–3.5 metres (8.2–11.5 ft) and bodies over...
The bald eagle (Haliaeetus leucocephalus) is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with...
fuligula) is a small diving duck with a population of close to one million birds, found in northern Eurasia. The scientific name is derived from Ancient...
ornith- 'bird' and pteron 'wing') is an aircraft that flies by flapping its wings. Designers sought to imitate the flapping-wing flight of birds, bats,...
regular measurements made during bird banding (ringing) and is particularly useful in feeding studies. There are several standard measurements that can...
which are visible in flight. The species is known for its ability to mimic bird calls and other types of sound, including artificial and electronic noises...
Stuff Awarded to Bird Site Analyzer 1999 – Antenna Tester patent granted 1959 – Thruline power measurement patent granted US US2752572A, Bird, James R.; Stevens...
which has a complete sclerotic ring but no orbit depth measurement. The main structures of the bird eye are similar to those of other vertebrates. The outer...
black streaks. These birds have long, pointed bills and their heads are striped with light brown and black bands. Measurements: Length: 6.3–10.2 in (16–26 cm)...
on the coastline at which measurements are taken). The smaller the scale interval (meaning the more detailed the measurement), the longer the coastline...
English units were the units of measurement used in England up to 1826 (when they were replaced by Imperial units), which evolved as a combination of...
an electronic transit theodolite integrated with electronic distance measurement (EDM) to measure both vertical and horizontal angles and the slope distance...
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