A falcon ( /ˈfɔːlkən/ or /ˈfælkən/) is any species of raptor in the genus Falco. The genus contains 37 species, widely distributed throughout Europe, Asia, and North America.
Adult falcons have thin tapered wings, which enable them to fly at high speed and to change direction rapidly. Fledgling falcons, in their first year of flying, have longer flight feathers which makes their configuration more like that of a general-purpose bird such as a broadwing. This makes it easier to fly while learning the exceptional skills required to be effective hunters as adults.
Peregrine Falcons have been recorded diving at speeds of 200 miles per hour (320 km/h), making them the fastest-moving creatures on Earth. Other falcons include the Gyrfalcon, Lanner Falcon, and the Merlin. Some small falcons with long narrow wings are called hobbies, and some which hover while hunting are called kestrels. The falcons are part of the family Falconidae, which also includes the caracaras, Laughing Falcon, forest falcons, and falconets.
The traditional term for a male falcon is tercel (British spelling) or tiercel (American spelling), from Latin tertius = third because of the belief that only one in three eggs hatched a male bird. Some sources give the etymology as deriving from the fact that a male falcon is approximately one third smaller than the female (Old French tiercelet).
A falcon chick, especially one reared for falconry, that is still in its downy stage is known as an eyas (sometimes spelt eyass). The word arose by mistaken division of Old French un niais, from Latin presumed nidiscus ("nestling", from nidus = nest). The technique of hunting with trained captive birds of prey is known as falconry.
As is the case with many birds of prey, falcons have exceptional powers of vision; the visual acuity of one species has been measured at 2.6 times that of a normal human.
In February 2005, the Canadian ornithologist Louis Lefebvre announced a method of measuring avian intelligence in terms of a bird's innovation in feeding habits. The falcon and corvids scored highest on this scale.
Read more about Falcon: Systematics and Evolution
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Famous quotes containing the word falcon:
“My falcon now is sharp and passing empty,
And till she stoop she must not be full-gorged,
For then she never looks upon her lure.”
—William Shakespeare (1564–1616)
“The quality of decision is like the well-timed swoop of a falcon which enables it to strike and destroy its victim.”
—Sun Tzu (6–5th century B.C.)
“Turning and turning in the widening gyre
The falcon cannot hear the falconer;
Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world,”
—William Butler Yeats (1865–1939)