Hawk

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Hawk
Northern Goshawk ad M2.jpg
Adult Eurasian goshawk
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Accipitriformes
Family: Accipitridae
Sharp-shinned hawk, a small member of the Accipitrinae subfamily Accipiter striatusDO1908P02CA.JPG
Sharp-shinned hawk, a small member of the Accipitrinae subfamily

Hawks are birds of prey of the family Accipitridae. They are very widely distributed and are found on all continents except Antarctica. [1]

Contents

The subfamily Accipitrinae includes goshawks, sparrowhawks, sharp-shinned hawks, and others. This subfamily are mainly woodland birds with short broad wings, long tails, and high visual acuity. They hunt by dashing suddenly from a concealed perch. [2]

In America, members of the Buteo group are also called hawks, though birds of this group are called buzzards in other parts of the world. Generally, buteos have broad wings and sturdy builds. They are relatively larger-winged and shorter-tailed than accipiters, and fly further distances in open areas. Buteos descend or pounce on their prey rather than engaging in fast, horizontal pursuit.

The terms accipitrine hawk and buteonine hawk are used to distinguish between the types in regions where hawk applies to both. The term "true hawk" is sometimes used for the accipitrine hawks in regions where buzzard is preferred for the buteonine hawks.

All these groups are members of the family Accipitridae, which includes hawks and buzzards as well as kites, harriers, and eagles. To confuse things further, some authors use "hawk" generally for any small to medium Accipitrid that is not an eagle. [3]

A Red-tailed hawk (Buteo jamaicensis), a member of the Buteo group Red-tailed Hawk.jpg
A Red-tailed hawk (Buteo jamaicensis), a member of the Buteo group

The common names of some birds include the term "hawk", reflecting traditional usage rather than taxonomy. For example, some people may call an osprey a "fish hawk" or a peregrine falcon a "duck hawk".

History

Falconry was once called "hawking", and any bird used for falconry could be referred to as a hawk. [4]

Aristotle listed eleven types of ἱέρακες (hierakes, hawks; singular ἱέραξ, hierax): aisalōn (merlin), asterias, hypotriorchēs, kirkos, leios, perkos, phassophonos, phrynologos, pternis, spizias, and triorchēs. Pliny numbered sixteen kinds of hawks, but named only aigithos, epileios, kenchrēïs (kestrel), kybindis, and triorchēs (buzzard). [5]

Groups

Accipiterine group

Accipitrine hawks generally hunt other birds as their primary prey and thus are sometimes called "hen-hawks". Similarly, they are sometimes called "wood-hawks" because of their woodland habitat.Though they are also known as "True Hawks" With most being called Sparrowhawks or Goshawks with the both being named such because of them hunting small birds (like sparrow) and large water-fowl (like goose) respectively

The subfamily Accipitrinae contains the genus Accipiter as well as the genera Micronisus (Gabar goshawk), Urotriorchis (long-tailed hawk), and Megatriorchis (Doria's goshawk). Melierax (chanting goshawk) may be included in the subfamily or given a subfamily of its own.

Erythrotriorchis (red- and chestnut-shouldered goshawk) is traditionally included in Accipitridae, but is possibly a convergent genus from an unrelated group (see red goshawk taxonomy).

Buteonine group

The "Buteonine group" includes genera Buteo , Parabuteo , Geranoetus , and most of Leucopternis . Members of this group have also been called "hawk-buzzards". [6]

The proposed new genera Morphnarchus , Rupornis , and Pseudastur would be formed from members of Buteo and Leucopternis. [7]

Members of the " Buteogallus group" are also called hawks, with the exception of solitary eagle species. Buteo is the type genus of the subfamily Buteoninae. This subfamily traditionally includes eagles and sea-eagles, but Lerner and Mindell (2005) [8] proposed placing them into separate the subfamilies Aquilinae and Haliaaetinae. This would leave only the buteonine hawks/buzzards in Buteoninae.

Characteristics

Intelligence

In February 2005, Canadian ornithologist Louis Lefebvre announced a method of measuring avian "IQ" by measuring their innovation in feeding habits. Based on this scale, hawks were named among the most intelligent birds. [9]

The hawk is very intelligent towards humans and other hawks. [10]

Eyesight

Hawks, like most birds, are tetrachromats with four types of colour receptors in the eye. Unlike some birds, but similar to other diurnal raptors, most hawk species are violet-sensitive but cannot perceive ultraviolet light. [11] Hawks also have relatively high visual acuity – the distance at which they can resolve an image – with red-tailed hawks reported to have 16.8 cycles per degree. [12] This is due to the large number of photoreceptors in the retina (up to 1,000,000 per square mm in Buteo, compared to 200,000 in humans), a high number of nerves connecting these receptors to the brain, and an indented fovea, which magnifies the central portion of the visual field. [13] [14] [15] Hawks additionally have two foveae (depressions in the retina with high photoreceptor density) in each eye, one centrally-placed and the other temporally-placed. [16] Finally, the eyeball is elongated, placing the lens far from the retina and giving a long focal length. [17]

Migration

Like most birds, hawks migrate in the autumn and the spring. The autumn migration season begins in August and ends mid-December, and different types of hawk choose different times in each season to migrate. Some migration distances are longer than others, and birds traveling longer distances tend to depart in early autumn while those traveling shorter distances start much later. Studies have shown that it is better for a hawk to arrive at its destination as early as possible to have first pick of mates, territory, food, and other resources. [18]

There are a variety of factors impacting the strategy and success of a hawk's migration. Kerlinger states that a bird has more body fat when it begins its migration than when it arrives at its destination. Thus, the more fat a bird has when it begins its migration, the better its chances of making the trip safely. Flight path is another important factor in migration because a bird's route can greatly affect the conditions it encounters during its journey. For example, wind direction and speed can either throw the bird off course or push it in the right direction. [19] Due to the relative variability of air conditions over large bodies of water and the resulting impact on safety, hawks tend to avoid any large bodies of water while migrating by detouring around lakes or flying along coasts. [20]

Hawkwatching is a citizen scientist activity that monitors hawk migration and provides data to the scientific community.

Habitat and distribution

The red-tailed hawk is probably the most common hawk in North America. [21]

Past observations have indicated that, while hawks can easily adapt to most environments, they prefer open habitats such as deserts and fields, likely because it is easier to spot prey. As they are able to live anywhere, they can also be found in mountainous plains and tropical, moist areas such as Central America, the West Indies, and Jamaica. [22]

Behavior

Perch Hunting. This perching hawk located, captured and returned with prey at sunset

Parents feed young hawks from early in their lives until they leave the nest. [23] Young hawks, while still in the fledgling phase, will leave their nests as early as six weeks old, but they do not hunt until they are older. Like most birds of prey, hawks kill their prey with their talons. Hawks usually prefer hunting just before nightfall when daylight lessens. [18] Although hawks are known for being violent predators, some are gentle and quiet.[ citation needed ]

Hawks fly by flapping their wings rapidly then relying on momentum to glide through the air. [20] Like other birds, they are known to form flocks when migrating, which improves survival rates over traveling alone. Flocks of birds, especially hawks, are sometimes called "kettles" in the United States.[ non sequitur ] [19] :215–16

Reproduction

Hawks are known for their unique mating season and means of reproduction.

Some species of hawk are monogamous and have one partner their whole lives. The male and female of a mating pair build their nest before mating season then improve it throughout nesting season. They usually do this before mating. [20]

Hawks have a striking mating ritual. First, a male and a female fly together in a circular motion. Once they reach a certain height, the male dives toward the female before ascending back to that height. The two birds repeat this until the male latches onto the female, and they begin to free-fall towards the ground.

In one year, a female hawk will lay about five eggs. Both the male and the female guard and care for the eggs for about a month until they hatch. [23]

Diet

Red-tailed hawk removing fur from a rodent before eating it, Mission Peak Regional Preserve, California

Hawks feed on a variety of smaller animals such as snakes, lizards, fish, mice, rabbits, squirrels, birds, or any other type of small game that is found on the ground. [23] As an example, red-shouldered hawks eat smaller birds like doves as well as bugs like grasshoppers and crickets. [20]

In culture

The term war hawk , or simply hawk, is used in politics to describe someone perceived as favoring war. The term reportedly originated in the United States during the 1810 debates in Congress over a possible war with Great Britain. Congressman John Randolph is said to have referred to Henry Clay's pro-war faction as the "war-hawks". [24]

Numerous sporting clubs, such as the Atlanta Hawks, the Hawthorn Hawks, and the Malmö Redhawks, use the bird as an emblem. The sports teams of Miami University in Oxford, Ohio officially became known as the RedHawks in 1997 after changing the name from Redskins. The sports teams of Saint Joseph's University in Philadelphia, PA use the Hawk as emblem for sports teams as well for students and graduates.

Mughal Emperor Aurangzeb holding a hawk in his darbar Aurangzeb-portrait.jpg
Mughal Emperor Aurangzeb holding a hawk in his darbar

Hawks are strongly associated with Guru Gobind Singh in the Sikh community. He is believed to have kept a white Northern Goshawk. As a result, the Northern Goshawk was made the official state bird of Punjab, India. [25] [26] [27] [28]

Related Research Articles

<span class="mw-page-title-main">Common buzzard</span> Species of bird of prey

The common buzzard is a medium-to-large bird of prey which has a large range. It is a member of the genus Buteo in the family Accipitridae. The species lives in most of Europe and extends its breeding range across much of the Palearctic as far as northwestern China, far western Siberia and northwestern Mongolia. Over much of its range, it is a year-round resident. However, buzzards from the colder parts of the Northern Hemisphere as well as those that breed in the eastern part of their range typically migrate south for the northern winter, many journeying as far as South Africa.

<span class="mw-page-title-main">Eagle</span> Large carnivore bird

Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family of the Accipitridae. Eagles belong to several groups of genera, some of which are closely related. True eagles comprise the genus Aquila. Most of the 68 species of eagles are from Eurasia and Africa. Outside this area, just 14 species can be found—two in North America, nine in Central and South America, and three in Australia.

<span class="mw-page-title-main">Bird of prey</span> Paraphyletic group of birds

Birds of prey or predatory birds, also known as raptors, are hypercarnivorous bird species that actively hunt and feed on other vertebrates. In addition to speed and strength, these predators have keen eyesight for detecting prey from a distance or during flight, strong feet with sharp talons for grasping or killing prey, and powerful, curved beaks for tearing off flesh. Although predatory birds primarily hunt live prey, many species also scavenge and eat carrion.

<span class="mw-page-title-main">Accipitridae</span> Family of birds of prey

The Accipitridae is one of the four families within the order Accipitriformes, and is a family of small to large birds of prey with strongly hooked bills and variable morphology based on diet. They feed on a range of prey items from insects to medium-sized mammals, with a number feeding on carrion and a few feeding on fruit. The Accipitridae have a cosmopolitan distribution, being found on all the world's continents and a number of oceanic island groups. Some species are migratory. The family contains 256 species which are divided into 12 subfamilies and 75 genera.

<span class="mw-page-title-main">Falconry</span> Hunting with a trained bird of prey

Falconry is the hunting of wild animals in their natural state and habitat by means of a trained bird of prey. Small animals are hunted; squirrels and rabbits often fall prey to these birds. Two traditional terms are used to describe a person involved in falconry: a "falconer" flies a falcon; an "austringer" keeps Goshawks and uses accipiters for hunting. In modern falconry, the red-tailed hawk, Harris's hawk, and the peregrine falcon are some of the more commonly used birds of prey. The practice of hunting with a conditioned falconry bird is also called "hawking" or "gamehawking", although the words hawking and hawker have become used so much to refer to petty traveling traders, that the terms "falconer" and "falconry" now apply to most use of trained birds of prey to catch game. However, many contemporary practitioners still use these words in their original meaning.

<span class="mw-page-title-main">Kite (bird)</span> Bird of prey

Kite is the common name for certain birds of prey in the family Accipitridae, particularly in the subfamilies Elaninae and Perninae and certain genera within Buteoninae. The term is derived from Old English cȳta, possibly from the onomatopoeic Proto-Indo-European root *gū- , "screech."

<span class="mw-page-title-main">European honey buzzard</span> Species of bird

The European honey buzzard, also known as the pern or common pern, is a bird of prey in the family Accipitridae.

<i>Buteo</i> Genus of birds-of-prey including various buzzards and hawks

Buteo is a genus of medium to fairly large, wide-ranging raptors with a robust body and broad wings. In the Old World, members of this genus are called "buzzards", but "hawk" is used in the New World. As both terms are ambiguous, buteo is sometimes used instead, for example, by the Peregrine Fund.

<span class="mw-page-title-main">Red-tailed hawk</span> Species of bird

The red-tailed hawk is a bird of prey that breeds throughout most of North America, from the interior of Alaska and northern Canada to as far south as Panama and the West Indies. It is one of the most common members of the genus Buteo. The red-tailed hawk is one of three species colloquially known in the United States as the "chickenhawk", though it rarely preys on standard-sized chickens.

<span class="mw-page-title-main">Broad-winged hawk</span> Species of bird

The broad-winged hawk is a medium-sized hawk of the genus Buteo. During the summer, some subspecies are distributed over eastern North America, as far west as British Columbia and Texas; they then migrate south to winter in the Neotropics from Mexico south to southern Brazil. Other subspecies are all-year residents on Caribbean islands. As in most raptors, females are slightly larger than males. Broad-winged hawks' wings are relatively short and broad with a tapered, somewhat pointed appearance. The two types of coloration are a dark morph with fewer white areas and a light morph that is more pale overall. Although the broad-winged hawk's numbers are relatively stable, populations are declining in some parts of its breeding range because of forest fragmentation.

<i>Accipiter</i> Genus of birds

Accipiter is a genus of birds of prey in the family Accipitridae. Most species are called sparrowhawks, but there are many sparrowhawks in other genera too, such as Tachyspiza.

<span class="mw-page-title-main">Buteoninae</span> Subfamily of birds

The Buteoninae are a subfamily of birds of prey which consists of medium to large, broad-winged species.

<span class="mw-page-title-main">Crested honey buzzard</span> Species of bird

The crested honey buzzard is a bird of prey in the family Accipitridae, which also includes many other diurnal raptors such as kites, eagles, and harriers. Pernis ptilorhynchus has six subspecies. As a medium-sized raptor, their size ranges between 57–60 cm (22–24 in). They are also known as the Oriental, Asiatic, or Eastern honey buzzard. The name is derived from its diet, which consists mainly of the larvae of bees and wasps extracted from honey combs.

<span class="mw-page-title-main">Lizard buzzard</span> Species of bird

The lizard buzzard, or lizard hawk, is a bird of prey in the family Accipitridae. It is the only species placed in the genus Kaupifalco. It is native to Sub-Saharan Africa. Despite its name, it may be more closely related to the Accipiter hawks than the Buteo buzzards.

<span class="mw-page-title-main">Harris's hawk</span> Species of bird

Harris's hawk, formerly known as the bay-winged hawk or dusky hawk, and known in Latin America as the peuco, is a medium-large bird of prey that breeds from the southwestern United States south to Chile, central Argentina, and Brazil. This bird is sometimes reported to be at large in Western Europe, especially Britain, but it is a popular species in falconry and these records almost invariably all refer to escapes from captivity.

<span class="mw-page-title-main">Black-chested buzzard-eagle</span> Species of bird

The black-chested buzzard-eagle is a bird of prey of the hawk and eagle family (Accipitridae). It lives in open regions of South America. This species is also known as the black buzzard-eagle, the gray buzzard-eagle, or analogously with "eagle" or "eagle-buzzard" replacing "buzzard-eagle", or as the Chilean blue eagle. It is sometimes placed in the genus Buteo.

<i>Buteogallus</i> Genus of birds

Buteogallus is a genus of birds of prey in the family Accipitridae. All members of this genus are essentially neotropical, but the distribution of a single species extends slightly into the extreme southwestern United States. Many of the species are fond of large crustaceans and even patrol long stretches of shore or riverbank on foot where such prey abounds, but some have a rather different lifestyle. Unlike many other genera of raptor, some members are referred to as "hawks", and others as "eagles".

<span class="mw-page-title-main">Eurasian goshawk</span> Species of bird

The Eurasian goshawk is a species of medium-large bird of prey in the family Accipitridae, a family which also includes other extant diurnal raptors, such as eagles, buzzards and harriers. It was formerly placed in the genus Accipiter. It is a widespread species that inhabits many of the temperate parts of the Eurasia. Except in a small portion of southern Asia, it is the only species of "goshawk" in its range and it is thus often referred to, both officially and unofficially, as simply goshawk. It is mainly resident, but birds from colder regions migrate south for the winter. As of 2023, goshawks found in North America are no longer considered be conspecific, but are now designated as the American goshawk.

<span class="mw-page-title-main">Gray hawk</span> Species of raptor

The gray hawk or Mexican goshawk is a smallish raptor found in open country and forest edges. It is sometimes placed in the genus Asturina as Asturina plagiata. The species was split by the American Ornithological Society (AOU) from the gray-lined hawk. The gray hawk is found from Costa Rica north into the southwestern United States.

<span class="mw-page-title-main">Hawkwatching</span> Citizen science activity

Hawkwatching is a mainly citizen science activity where experienced volunteers count migratory raptors in an effort to survey migratory numbers. Groups of hawkwatchers often congregate along well-known migratory routes such as mountain ridges, coastlines and land bridges, where raptors ride on updrafts created by the topography. Hawkwatches are often formally or informally organized by non-profit organizations such as an Audubon chapter, state park, wildlife refuge or other important birding area. Some hawkwatches remain independent of any organizing structure.

References

  1. "hawk | Types, Diet, & Facts | Britannica". www.britannica.com. Retrieved 2022-07-25.
  2. Campbell, B., Lack.E (2013) A Dictionary of Birds. p.273
  3. Debus, Stephen J. S. (1990). The birds of prey of Australia: a field guide. Melbourne: Oxford University Press. pp. 12, 16, 62. ISBN   0-19-550624-3. Debus writes that the osprey is "a large aquatic hawk, with adaptations for catching fish by plunge-diving into water"; the elanid kites are "small, gull-like, grey-and-white hawks with black forewing patches"; and, of the harriers, that the "hawks in this cosmopolitan genus ('circling hawk') are so-called because of their low harrying flight". But he refers to the "typical or milvine kites" as "large kites", not hawks.
  4. Little, William; Fowler, H. W.; Coulson, Jessie; Onions, C. T.; Friedrichsen, G. W. S. (1973) [1944]. "Hawk". The shorter Oxford English dictionary on historical principles (3 ed.). Oxford: Oxford University Press. ISBN   0-19-861-294-X. Any diurnal bird of prey used in Falconry ... In Nat. Hist., restricted to a bird of the subfamily Accipitrinæ ... To chase or hunt game with a trained hawk; to practise falconry. ... Thei hauke, thei hunt, thei card, thei dice. Latimer [Hugh 1485? 1555]
  5. Arnott, W. Geoffrey (2007). "Hierax". Birds in the Ancient World from A to Z. Routledge. ISBN   9781134556267.
  6. "Hawk". The Encyclopedia Americana. 1920.
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  9. EurekAlert! Public News List:Bird IQ test takes flight - Dr. Lefebvre's AAAS presentation - Feeding innovations and forebrain size in birds (Monday, February 21, 2005)Part of the symposium: Mind, Brain and Behavior
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  14. Kirschbaum, Kari. "Family Accipitridae". AnimalDiversity Web. University of Michigan Museum of Zoology. Retrieved 2010-01-30.
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  16. Mitkus, Mindaugas; Olsson, Peter; Toomey, Matthew B.; Corbo, Joseph C.; Kelber, Almut (2017). "Specialized photoreceptor composition in the raptor fovea". The Journal of Comparative Neurology. 525 (9): 2152–2163. doi:10.1002/cne.24190. PMC   6235456 . PMID   28199005.
  17. "How Far Can Hawks Really See? (The Truth Explained) | Birdie Learning". birdielearning.com. 2023-11-25. Retrieved 2024-10-18.
  18. 1 2 Heintzelman, Donald S. (1986). The Migration of Hawks. Bloomington: Indiana University Press. p. 40.
  19. 1 2 Kerlinger, Paul (1989). Flight Strategies of Migrating Hawks. Chicago: The University of Chicago Press. pp. 57–58, 153.
  20. 1 2 3 4 Heintzelman, Donald S. (2004). Hawks & Owls in Eastern North America. New Brunswick: Rutgers University Press. pp. 96–98. ISBN   9780813533506.
  21. "Red-tailed Hawk Overview, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2023-03-30.
  22. "Where Do Red-tailed Hawks Live? (Habitat + Distribution)". Birdfact. Retrieved 2024-10-18.
  23. 1 2 3 "Red-Tailed Hawk". National Geographic. 11 November 2010. Archived from the original on January 29, 2010. Retrieved 18 October 2012.
  24. p 156, "Fighting Words, From War, Rebellions, and Other Combative Capers by Christine Ammer.:
  25. "Lost in flight: State bird of Punjab missing from the state!". Hindustan Times. 2017-09-14. Retrieved 2021-04-19.
  26. "State Bird is BAAZ". Archived from the original on 14 July 2014.
  27. "Baj: The Hawk and the Sikhs | Harinder Singh | SikhRI Articles".
  28. Dhavan, Purnima (2011). "When Sparrows Became Hawks". doi:10.1093/acprof:oso/9780199756551.001.0001. ISBN   978-0-19-975655-1 via ResearchGate.