This page is a soft redirect.Fish Hawk]].
The osprey (Pandion haliaetus), sometimes known as the fish eagle, sea hawk, river hawk, or fish hawk, is a diurnal, fish-eating bird of prey. It is a large raptor, reaching more than Script error: No such module "convert". in length and Script error: No such module "convert". across the wings. It is brown on the upperparts and predominantly greyish on the head and underparts.
The osprey tolerates a wide variety of habitats, nesting in any location near a body of water providing an adequate food supply. It is found on all continents except Antarctica, although in South America it occurs only as a non-breeding migrant.
As its other common name suggests, the osprey's diet consists almost exclusively of fish. It possesses specialised physical characteristics and exhibits unique behaviour to assist in hunting and catching prey. As a result of these unique characteristics, it has been given its own taxonomic genus, Pandion and family, Pandionidae. Four subspecies are usually recognized, one of which has recently been given full species status (see below). Despite its propensity to nest near water, the osprey is not classed as a sea eagle.
Taxonomy and systematics
The osprey was one of the many species described by Carl Linnaeus in his 18th-century work, Systema Naturae, and named as Falco haliaeetus. The genus, Pandion, is the sole member of the family of Pandionidae, and used to contain only one species, the osprey (P. haliaetus). The genus Pandion was described by the French zoologist Marie Jules César Savigny in 1809, and is taken from a mythical Greek king, Pandion.
The osprey differs in several respects from other diurnal birds of prey. Its toes are of equal length, its tarsi are reticulate, and its talons are rounded, rather than grooved. The osprey and owls are the only raptors whose outer toe is reversible, allowing them to grasp their prey with two toes in front and two behind. This is particularly helpful when they grab slippery fish. It has always presented something of a riddle to taxonomists, but here it is treated as the sole living member of the family Pandionidae, and the family listed in its traditional place as part of the order Falconiformes. Other schemes place it alongside the hawks and eagles in the family Accipitridae—which itself can be regarded as making up the bulk of the order Accipitriformes or else be lumped with the Falconidae into Falconiformes. The Sibley-Ahlquist taxonomy has placed it together with the other diurnal raptors in a greatly enlarged Ciconiiformes, but this results in an unnatural paraphyletic classification.
The osprey is unusual in that it is a single living species that occurs nearly worldwide. Even the few subspecies are not unequivocally separable. There are four generally recognised subspecies, although differences are small, and ITIS only lists the first two.
- P. h. haliaetus – (Linnaeus, 1758): Palearctic.
- P. h. carolinensis – (Gmelin, 1788): North America. This form is larger, darker bodied and has a paler breast than nominate haliaetus.
- P. h. ridgwayi – Maynard, 1887: Caribbean islands. This form has a very pale head and breast compared with nominate haliaetus, with only a weak eye mask. It is non-migratory. Its scientific name commemorates American ornithologist Robert Ridgway.
- P. h. cristatus – (Vieillot, 1816): coastline and some large rivers of Australia and Tasmania. The smallest and most distinctive subspecies, also non-migratory.
To date there have been two extinct species named from the fossil record. Pandion homalopteron was named by Stuart L. Warter in 1976 from fossils of Middle Miocene, Barstovian age, found in marine deposits in the southern part of the U.S. state of California. The second named species Pandion lovensis, was described in 1985 by Jonathan J. Becker from fossils found in the U.S. state of Florida and dating to the latest Clarendonian and possibly representing a separate lineage from that of P. homalopteron and P. haliaetus. A number of claw fossils have been recovered from Pliocene and Pleistocene sediments in Florida and South Carolina, USA. The oldest recognized Pandionidae family fossils have been recovered from the Oligocene age Jebel Qatrani Formation, of Faiyum, Egypt. However they are not complete enough to assign to a specific genus. Another Pandionidae claw fossil was recovered from Early Oligocene deposits in the Mainz basin, Germany, and was described in 2006 by Gerald Mayr.
The genus name Pandion is after the mythical Greek king Pandion of Athens and grandfather of Theseus, who was transformed into an eagle. The specific epithet haliaetus is derived from the Greek ἁλιάετος "fishery eagle".
The origins of osprey are obscure; the word itself was first recorded around 1460, derived via the Anglo-French ospriet and the Medieval Latin avis prede "bird of prey," from the Latin avis praedæ though the Oxford English Dictionary notes a connection with the Latin ossifraga or "bone breaker" of Pliny the Elder. However, this term referred to the Lammergeier.
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The osprey is Script error: No such module "convert". in weight and Script error: No such module "convert". in length with a Script error: No such module "convert". wingspan. It is, thus, of similar size to the largest members of the Buteo or Falco genera. The subspecies are fairly close in size, with the nominate subspecies averaging Script error: No such module "convert"., P. h. carolinensis averaging Script error: No such module "convert". and P. h. cristatus averaging Script error: No such module "convert".. The wing chord measures Script error: No such module "convert"., the tail measures Script error: No such module "convert". and the tarsus is Script error: No such module "convert".. The upperparts are a deep, glossy brown, while the breast is white and sometimes streaked with brown, and the underparts are pure white. The head is white with a dark mask across the eyes, reaching to the sides of the neck. The irises of the eyes are golden to brown, and the transparent nictitating membrane is pale blue. The bill is black, with a blue cere, and the feet are white with black talons. A short tail and long, narrow wings with four long, finger-like feathers, and a shorter fifth, give it a very distinctive appearance.
The sexes appear fairly similar, but the adult male can be distinguished from the female by its slimmer body and narrower wings. The breast band of the male is also weaker than that of the female, or is non-existent, and the underwing coverts of the male are more uniformly pale. It is straightforward to determine the sex in a breeding pair, but harder with individual birds.
The juvenile osprey may be identified by buff fringes to the plumage of the upperparts, a buff tone to the underparts, and streaked feathers on the head. During spring, barring on the underwings and flight feathers is a better indicator of a young bird, due to wear on the upperparts.
In flight, the osprey has arched wings and drooping "hands", giving it a gull-like appearance. The call is a series of sharp whistles, described as cheep, cheep or yewk, yewk. If disturbed by activity near the nest, the call is a frenzied cheereek!
Distribution and habitat
The osprey is the second most widely distributed raptor species, after the peregrine falcon. It has a worldwide distribution and is found in temperate and tropical regions of all continents except Antarctica. In North America it breeds from Alaska and Newfoundland south to the Gulf Coast and Florida, wintering further south from the southern United States through to Argentina. It is found in summer throughout Europe north into Ireland, Scandinavia, Finland and Scotland, England, and Wales though not Iceland, and winters in North Africa. In Australia it is mainly sedentary and found patchily around the coastline, though it is a non-breeding visitor to eastern Victoria and Tasmania. There is a Script error: No such module "convert". gap, corresponding with the coast of the Nullarbor Plain, between its westernmost breeding site in South Australia and the nearest breeding sites to the west in Western Australia. In the islands of the Pacific it is found in the Bismarck Islands, Solomon Islands and New Caledonia, and fossil remains of adults and juveniles have been found in Tonga, where it probably was wiped out by arriving humans. It is possible it may once have ranged across Vanuatu and Fiji as well. It is an uncommon to fairly common winter visitor to all parts of South Asia, and Southeast Asia from Myanmar through to Indochina and southern China, Indonesia, Malaysia and the Philippines.
Behaviour and ecology
Fish make up 99% of the osprey's diet. It typically takes fish weighing Script error: No such module "convert". and about Script error: No such module "convert". in length, but the weight can range from Script error: No such module "convert". to Script error: No such module "convert".. Virtually any type of fish in that size range are taken.
Ospreys have vision that is well adapted to detecting underwater objects from the air. Prey is first sighted when the osprey is Script error: No such module "convert". above the water, after which the bird hovers momentarily then plunges feet first into the water.
The osprey is particularly well adapted to this diet, with reversible outer toes, sharp spicules on the underside of the toes, closable nostrils to keep out water during dives, and backwards-facing scales on the talons which act as barbs to help hold its catch.
The osprey breeds near freshwater lakes and rivers, and sometimes on coastal brackish waters. Rocky outcrops just offshore are used in Rottnest Island off the coast of Western Australia, where there are 14 or so similar nesting sites of which five to seven are used in any one year. Many are renovated each season, and some have been used for 70 years. The nest is a large heap of sticks, driftwood and seaweed built in forks of trees, rocky outcrops, utility poles, artificial platforms or offshore islets. Generally, ospreys reach sexual maturity and begin breeding around the age of three to four, though in some regions with high osprey densities, such as Chesapeake Bay in the U.S., they may not start breeding until five to seven years old, and there may be a shortage of suitable tall structures. If there are no nesting sites available, young ospreys may be forced to delay breeding. To ease this problem, posts are sometimes erected to provide more sites suitable for nest building.
The platform design developed by one organization, Citizens United to Protect the Maurice River and Its Tributaries, Inc. has become the official design of the State of New Jersey, U.S.A. The platform plans and materials list, available online, have been utilized by people from a number of different geographical regions. Osprey-watch.org is the global site for mapping osprey nest locations and logging observations on reproductive success.
Ospreys usually mate for life. Rarely, polyandry has been recorded. The breeding season varies according to latitude; spring (September–October) in southern Australia, April to July in northern Australia and winter (June–August) in southern Queensland. In spring the pair begins a five-month period of partnership to raise their young. The female lays two to four eggs within a month, and relies on the size of the nest to conserve heat. The eggs are whitish with bold splotches of reddish-brown and are about Script error: No such module "convert". and weigh about Script error: No such module "convert".. The eggs are incubated for about 5 weeks to hatching.
The newly hatched chicks weigh only Script error: No such module "convert"., but fledge in 8–10 weeks. A study on Kangaroo Island, South Australia, had an average time between hatching and fledging of 69 days. The same study found an average of 0.66 young fledged per year per occupied territory, and 0.92 young fledged per year per active nest. Some 22% of surviving young either remained on the island or returned at maturity to join the breeding population. When food is scarce, the first chicks to hatch are most likely to survive. The typical lifespan is 7–10 years, though rarely individuals can grow to as old as 20–25 years. The oldest European wild osprey on record lived to be over thirty years of age. In North America, great horned owls (Bubo virginianus), golden eagles (Aquila chrysaetos), and bald eagles (Haliaeetus leucocephalus) are the only major predators of ospreys, capable of taking both nestlings and adults. However, kleptoparasitism by bald eagles, where the larger raptor steals the osprey's catch, is more common than predation. The white-tailed eagle (Haliaeetus albicilla), which is very similar to the bald eagle, may harass or predate the osprey in Eurasia. Raccoons (Procyon lotor) can be a serious threat to nestlings or eggs if they can access the nest. Endoparasitic trematodes (Scaphanocephalus expansus and Neodiplostomum spp.) have been recorded in wild ospreys.
European breeders winter in Africa. American and Canadian breeders winter in South America, although some stay in the southernmost U.S. states such as Florida and California. Some ospreys from Florida migrate to South America. Australasian ospreys tend not to migrate.
Studies of Swedish ospreys showed that females tend to migrate to Africa earlier than the males. More stopovers are made during their autumn migration. The variation of timing and duration in autumn was more variable than in spring. Although migrating predominantly in the day, they sometimes fly in the dark hours particularly in crossings over water and cover on average Script error: No such module "convert". per day with a maximum of Script error: No such module "convert". per day. European birds may also winter in South Asia, an osprey ringed in Norway has been recovered in western India.
Status and conservation
The osprey has a large range, covering Script error: No such module "convert". in just Africa and the Americas, and has a large global population estimated at 460,000 individuals. Although global population trends have not been quantified, the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e., declining more than 30% in ten years or three generations), and for these reasons, the species is evaluated as Least Concern. There is evidence for regional decline in South Australia where former territories at locations in the Spencer Gulf and along the lower Murray River have been vacant for decades.
In the late 19th and early 20th centuries, the main threats to osprey populations were egg collectors and hunting of the adults along with other birds of prey, but osprey populations declined drastically in many areas in the 1950s and 1960s; this appeared to be in part due to the toxic effects of insecticides such as DDT on reproduction. The pesticide interfered with the bird's calcium metabolism which resulted in thin-shelled, easily broken or infertile eggs. Possibly because of the banning of DDT in many countries in the early 1970s, together with reduced persecution, the osprey, as well as other affected bird of prey species, have made significant recoveries. In South Australia, nesting sites on the Eyre Peninsula and Kangaroo Island are vulnerable to unmanaged coastal recreation and encroaching urban development.
Another odd legend regarding this fish-eating bird of prey, derived from the writings of Albertus Magnus and recorded in Holinshed's Chronicles, was that it had one webbed foot and one taloned foot.
I think he'll be to Rome
As is the osprey to the fish, who takes it
By sovereignty of nature.
In Buddhism, the osprey is sometimes represented as the "King of Birds", especially in the 'The Jātaka: Or, Stories of the Buddha’s Former Births' , no.486.
So-called "osprey" plumes were an important item in the plume trade of the late 19th century and used in hats including those used as part of the army uniform. Despite their name, these plumes were actually obtained from egrets.
The osprey is depicted as a white eagle in heraldry, and more recently has become a symbol of positive responses to nature, and has been featured on more than 50 international postage stamps.
The osprey is used as a brand name for various products and sports teams. Examples include: the Ospreys (a Welsh Rugby team of the European country of Wales); the Richard Stockton College Osprey, (a NCAA Division III intercollegiate athletics team of the U.S. State of New Jersey); and the first college in the nation (and the only one for many years) to adopt the osprey as its mascot and athletic team name, North Florida Ospreys (a NCAA Division I intercollegiate athletics team), the Missoula Osprey (a minor league baseball team); the Seattle Seahawks (an American football team of the National Football League); the Wagner Seahawks (a NCAA Division I intercollegiate athletics team); and the Cold Spring Harbor Seahawks (a High school football team in Cold Spring Harbor, New York).
Examples of the osprey used as a mascot include: Ozzie Osprey (of the University of North Florida); Talon the Osprey of Richard Stockton College; Sammy the Seahawk (of University of North Carolina Wilmington); the Wells International Seahawks (of Bangkok, Thailand); the Salve Regina Seahawks (of Newport, Rhode Island); and the LA Harbor College Seahawks (of South Bay).
- BirdLife International (2013). "Pandion haliaetus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Linnaeus, Carl (1758). Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. (in Latina). Holmiae [Stockholm]: Laurentii Salvii. p. 91.
F. cera pedibusque caeruleis, corpore supra fusco subtus albo, capite albido
- "Pandion haliaetus". Integrated Taxonomic Information System. Retrieved 5 September 2007.
- Graves, R. (1955). "The Sons of Pandion". Greek Myths. London: Penguin. pp. 320–323. ISBN 0-14-001026-2.
- "All about Ospreys". From desk of Thisbe Nissen.
- Terres, J.K. (1980). The Audubon Society Encyclopedia of North American Birds. New York, NY: Knopf. pp. 644–646. ISBN 0-394-46651-9.
- Salzman, Eric (1993). "Sibley's Classification of Birds". Birding 58 (2): 91–98. Retrieved 5 September 2007.
- Tesky, Julie L. (1993). "Pandion haliaetus". U.S. Department of Agriculture, Forest Service. Retrieved 6 September 2007.
- Barrow, M.V. (1998). A passion for Birds: American ornithology after Audubon. Princeton, NJ: Princeton University Press. ISBN 0-691-04402-3.
- Christidis, L.; Boles, W.E. (2008). Systematics and Taxonomy of Australian Birds. Csiro Publishing. ISBN 0643065113.
- Pandion cristatus on Avibase
- "Pandion entry". Avibase. Retrieved 2 December 2010.
- Olson, S.L. (1985). "Chapter 2. The fossil record of birds". Avian Biology. Vol. 8. Academic Press. pp. 79–238. doi:10.1016/B978-0-12-249408-6.50011-X.
- Mayr, Gerald (2006). "An osprey (Aves: Accipitridae: Pandioninae) from the early Oligocene of Germany". Palaeobiodiversity and Palaeoenvironments 86 (1): 93–96. doi:10.1007/BF03043637.
- LSJ, s.v. ἁλιάετος
- Livingston, C.H. (1943). "Osprey and Ostril". Modern Language Notes 58 (2): 91–98. JSTOR 2911426. doi:10.2307/2911426.
- Morris, W. (1969). The American Heritage Dictionary of the English Language. Boston: American Heritage Publishing Co., Inc. and Houghton Mifflin Company.
- "Osprey". Online Etymology Dictionary. Retrieved 29 June 2007.
- Simpson, J.; Weiner, E., eds. (1989). "Osprey". Oxford English Dictionary (2nd ed.). Oxford: Clarendon Press. ISBN 0-19-861186-2.
- Ferguson-Lees, J.; Christie, D.A. (2001). Raptors of the World. Houghton Mifflin Company. ISBN 978-0-618-12762-7.
- "Osprey". All About Birds. Cornell Lab of Ornithology. – P. h. carolinensis
- "Osprey" (PDF). Connecticut Department of Environmental Protection. 1999. Archived from the original (PDF) on 10 June 2012. Retrieved 30 September 2007.
- Forsman, Dick (2008). The Raptors of Europe & the Middle East: A Handbook of Field Identification. Princeton University Press. pp. 21–25. ISBN 0-85661-098-4.
- Peterson, Roger Tory (1999). A Field Guide to the Birds. Houghton Mifflin Company. p. 136. ISBN 978-0-395-91176-1.
- Bull, J.; Farrand, J. Jr (1987). Audubon Society Field Guide to North American Birds: Eastern Region. New York: Alfred A. Knopf. p. 469. ISBN 0-394-41405-5.
- Hume, R. (2002). RSPB Birds of Britain and Europe. London: Dorling Kindersley. p. 89. ISBN 0-7513-1234-7.
- Simpson, K.; Day, N.; Trusler, P. (1993). Field Guide to the Birds of Australia. Ringwood, Victoria: Viking O'Neil. p. 66. ISBN 0-670-90478-3.
- Dennis, T.E. (2007). "Distribution and status of the Osprey (Pandion haliaetus) in South Australia". Emu 107 (4): 294–299. doi:10.1071/MU07009.
- Steadman, D. (2006). Extinction and Biogeography in Tropical Pacific Birds. University of Chicago Press. ISBN 978-0-226-77142-7.
- Rasmussen, P.C.; Anderton, J.C. (2005). Birds of South Asia. The Ripley Guide. Vols 1 & 2. Smithsonian Institution and Lynx Edicions. ISBN 978-8496553859.
- Strange, M. (2000). A Photographic Guide to the Birds of Southeast Asia including the Philippines and Borneo. Singapore: Periplus. p. 70. ISBN 962-593-403-0.
- Evans, D.L. (1982). "Status Reports on Twelve Raptors: Special Scientific Report Wildlife" (238). U.S. Department of the Interior, Fish and Wildlife Service.
- Poole, A.F.; Bierregaard, R.O.; Martell, M.S. (2002). Poole, A.; Gill, F., eds. Osprey (Pandion haliaetus). The Birds of North America (683) (Philadelphia, PA: The Birds of North America, Inc.).
- Clark, W.S.; Wheeler, B.K. (1987). A field guide to Hawks of North America. Boston: Houghton Mifflin. ISBN 0-395-36001-3.
- Goenka, D.N. (1985). "The Osprey (Pandion haliaetus haliaetus) preying on a Gull". Journal of the Bombay Natural History Society 82 (1): 193–194.
- Kirschbaum, K.; Watkins, P. "Pandion haliaetus". University of Michigan Museum of Zoology. Retrieved 3 January 2008.
- Beruldsen, G. (2003). Australian Birds: Their Nests and Eggs. Kenmore Hills, Queensland. p. 196. ISBN 0-646-42798-9.
- "Osprey". Chesapeake Bay Program. Retrieved 4 April 2013.
- "Osprey platform plans". cumauriceriver.org. Retrieved 23 November 2011.
- "Project Osprey Watch". Osprey-watch.org. Retrieved 30 September 2013.
- Dennis, T.E. (2007). "Reproductive activity in the Osprey (Pandion haliaetus) on Kangaroo Island, South Australia". Emu 107 (4): 300–307. doi:10.1071/MU07010.
- Flemming, S.P.; Bancroft, R.P. (1990). "Bald Eagle attacks Osprey nestling". Journal of Raptor Research 24: 26–27.
- Macdonald, J.; Seymour, N.R. (1994). "Bald Eagle attacks adult Osprey" (PDF). Journal of Raptor Research 28 (2): 122.
- Cold, C.W. (1993). "Adult male Osprey killed at nest by Great Horned Owl". Passenger Pigeon 55: 269–270.
- Lafontaine, A.R.; Fowler, J.H. (1976). "Golden Eagle preys on Osprey". Auk 93: 390–391.
- Willgohs, J.F. (1961). The white-tailed eagle Haliaëtus albicilla albicilla (Linné) in Norway. Norwegian Universities Press.
- Reese, J. (1969). "A Maryland Osprey population 75 years ago and today". Maryland Birdlife 25 (4): 116–119.
- Hoffman, Glenn L.; Wu, L.Y.; Kingscote, A.A. (1953). "Scaphanocephalus expansus (Crepl.), a Trematode of the Osprey, in North America". The Journal of Parasitology 39 (5): 568. doi:10.2307/3273860.
- Mullarney, Killian; Svensson, Lars; Zetterstrom, Dan; Grant, Peter (2001). Birds of Europe. Princeton University Press. pp. 74–75. ISBN 0-691-05054-6.
- "Migration Strategies and Wintering Areas of North American ospreys as Revealed by Satellite Telemetry" (PDF). Newsletter Winter 2000. Microwave Telemetry Inc. Retrieved 2 December 2008.
- Martell, M.S.; Mcmillian, M.A.; Solensky, M.J.; Mealey, B.K. (2004). "Partial migration and wintering use of Florida by ospreys" (PDF). Journal of Raptor Research 38 (1): 55–61. mirror
- Alerstam, T.; Hake, M.; Kjellén, N. (2006). "Temporal and spatial patterns of repeated migratory journeys by ospreys". Animal Behaviour 71 (3): 555–566. doi:10.1016/j.anbehav.2005.05.016.
- Mundkur, Taej (1988). "Recovery of a Norwegian ringed Osprey in Gujarat, India". Journal of the Bombay Natural History Society 85 (1): 190.
- Cocker, Mark; Mabey, Richard (2005). Birds Britannica. London: Chatto & Windus. pp. 136–141. ISBN 0-7011-6907-9.
- Ames, P. (1966). "DDT Residues in the eggs of the Osprey in the North-eastern United States and their relation to nesting success". Journal of Applied Ecology (British Ecological Society) 3 ((Suppl.)): 87–97. JSTOR 2401447. doi:10.2307/2401447.
- Ovid, Metamorphoses 8.90
- de Vries, Ad (1976). Dictionary of Symbols and Imagery. Amsterdam: North-Holland Publishing Company. p. 352. ISBN 0-7204-8021-3.
- Cooper, J.C. (1992). Symbolic and Mythological Animals. London: Aquarian Press. p. 170. ISBN 1-85538-118-4.
- "Birds and Millinery". Bird Notes and News 2 (1): 29. 1906.
- "Osprey". Birds of the World on Postage Stamps. Retrieved 1 January 2008.
- "The Osprey". gov.ns.ca. Province of Nova Scotia.
- "Cold Spring Harbor High School Seahawks".
- Visual ID at the Wayback Machine (archived November 19, 2007). University of North Florida
- "UNCW Facts". Archived from the original on 6 May 2009. Retrieved 16 April 2009.
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- Osprey – Pandion haliaetus – USGS Patuxent Bird Identification InfoCenter
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