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Birds are a group of warm-blooded vertebrates constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m common ostrich. There are over 11,000 living species, more than half of which are passerine, or "perching" birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. The study of birds is called ornithology.
Ornithology is a branch of zoology that concerns the study of birds. Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. It has also been an area with a large contribution made by amateurs in terms of time, resources, and financial support. Studies on birds have helped develop key concepts in biology including evolution, behaviour and ecology such as the definition of species, the process of speciation, instinct, learning, ecological niches, guilds, island biogeography, phylogeography, and conservation.
Dippers are members of the genus Cinclus in the bird family Cinclidae, so-called because of their bobbing or dipping movements. They are unique among passerines for their ability to dive and swim underwater.
The white-throated dipper, also known as the European dipper or just dipper, is an aquatic passerine bird found in Europe, Middle East, Central Asia and the Indian Subcontinent. The species is divided into several subspecies, based primarily on colour differences, particularly of the pectoral band.
The white-capped dipper is an aquatic passerine found in South America. It is a small black bird with white spots. It is found in the Andes from northern Bolivia, through Peru, Ecuador, Colombia to northwest Venezuela.
The brown dipper, also known as Pallas's dipper, Asian dipper or the Asiatic dipper, is an aquatic songbird found in the mountains of the east Palearctic. It is a thrush-like bird with a cocked tail. Its plumage is chocolate-brown with a slightly lighter coloured back and breast. At 22 cm (8.7 in) and 87 g (3.1 oz), it is the largest of the dippers. This species, which is not often seen, is found at medium to low elevations where mountain streams flow.
Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or from south to north. Migration is inherently risky, due to predation and mortality.
Struthionidae is a family of flightless birds, containing the extant ostriches and their extinct relatives. The two extant species of ostrich are the common ostrich and Somali ostrich, both in the genus Struthio, which also contains several species known from Holocene fossils such as the Asian ostrich. The common ostrich is the more widespread of the two living species, and is the largest living bird species. The extinct genus Pachystruthio from the Late Pliocene-Early Pleistocene of Eurasia is one of the largest birds ever.
The white wagtail is a small passerine bird in the family Motacillidae, which also includes pipits and longclaws. The species breeds in the Palearctic zone in most of Europe and Asia and parts of North Africa; it also has a toehold in western Alaska as a scarce breeder. It is resident in the mildest parts of its range, but otherwise migrates to Africa. In total, there are between 9 and 11 subspecies of M. alba; in Ireland and Great Britain, the black-backed subspecies known as the pied wagtail predominates.
The grey wagtail is a member of the wagtail family, Motacillidae, measuring around 18–19 cm overall length. The species looks somewhat similar to the yellow wagtail but has the yellow on its underside restricted to the throat and vent. Breeding males have a black throat. The species is widely distributed, with several populations breeding in Eurosiberia and migrating to tropical regions in Asia and Africa. The species is always associated with running water when breeding, although they may use man-made structures near streams for the nest. Outside the breeding season, they may also be seen around lakes, coasts and other watery habitats. Like other wagtails, they frequently wag their tail and fly low with undulations and they have a sharp call that is often given in flight.
The European rock pipit, or simply rock pipit, is a species of small passerine bird that breeds in western Europe on rocky coasts. It has streaked greyish-brown upperparts and buff underparts, and is similar in appearance to other European pipits. There are two subspecies, of which the nominate is non-migratory, and the Fennoscandian one is migratory, wintering in shoreline habitats further west and south in Europe. The European rock pipit is territorial at least in the breeding season, and year-round where it is resident. Males will sometimes enter an adjacent territory to assist the resident in repelling an intruder, behaviour only otherwise known from the African fiddler crab.
The white-faced storm petrel, also known as white-faced petrel or frigate petrel is a small seabird of the austral storm petrel family Oceanitidae. It is the only member of the monotypic genus Pelagodroma. It is widely distributed across the northern and southern hemisphere, especially around the coastal and open ocean waters of southern Australia, New Zealand, Tristan da Cunha, Cabo Verde, the Canary islands and the Selvagens islands.
The Cape vulture, also known as Cape griffon and Kolbe's vulture, is an Old World vulture in the family Accipitridae. It is endemic to southern Africa, and lives mainly in South Africa, Lesotho, Botswana, and in some parts of northern Namibia. It nests on cliffs and lays one egg per year. In 2015, it had been classified as Endangered on the IUCN Red List, but was down-listed to Vulnerable in 2021 as some populations increased and have been stable since about 2016.
Ostriches are large flightless birds. Two living species are recognised, the common ostrich, native to large areas of sub-Saharan Africa, and the Somali ostrich, native to the Horn of Africa.
The Amur falcon is a small raptor of the falcon family. It breeds in south-eastern Siberia and Northern China before migrating in large flocks across India and over the Arabian Sea to winter in Southern and East African coasts.
The African pygmy falcon —or simply pygmy falcon—is a diminutive raptor native to eastern and southern Africa. It is the sole species in its monotypic genus, Polihierax. The pygmy falcon is the smallest bird of prey on the African continent, and among the smallest raptors on earth; only the Asian falconets are smaller, weighing roughly 30-40 grams less and measuring about 5 cm shorter from head-to-tail.
The African pied wagtail, or African wagtail, is a species of bird in the family Motacillidae.
Ostrich: Journal of African Ornithology is a journal of African ornithology published by BirdLife South Africa, formerly the South African Ornithological Society, in association with the National Inquiry Services Centre (NISC) and Taylor & Francis. It contains papers on the birds of Africa and its islands, including peer-reviewed original scientific papers of 3000 to 5,000 words, short articles of up to 3000 words, perspectives, commentaries and reviews. Topics include behaviour, breeding, biology, conservation, ecology, migrations, movements and systematics. This is a hybrid journal: offering open access publishing, but also following the standard publishing model without charges to authors.
Stephen "Steve" J. OrmerodFCIEEM, is a professor of ecology and former Chair of the Council of the Royal Society for the Protection of Birds (RSPB), Europe's largest wildlife conservation charity.
The Masai ostrich, also known as the East African ostrich is a red-necked subspecies variety of the common ostrich and is endemic to East Africa. It is one of the largest birds in the world, second only to its sister subspecies Struthio camelus camelus. Today it is farmed for eggs, meat, and feathers.
References
- ↑ "2015 – Dr Stephanie Tyler – WOS" . Retrieved 3 July 2020.
- ↑ Tyler, Stephanie J. (1 January 1972). "The Behaviour and Social Organization of the New Forest Ponies". Animal Behaviour Monographs. 5: 87–196. doi:10.1016/0003-3472(72)90003-6. ISSN 0066-1856.
- 1 2 Tyler, Stephanie J. (1979). "Mortality and movements of Grey Wagtails". Ringing & Migration. 2 (3): 122–131. doi:10.1080/03078698.1979.9673744. ISSN 0307-8698.
- ↑ "Personalities. 11. Dr Stephanie Tyler". British Birds. Retrieved 3 July 2020.
- 1 2 3 4 "Stephanie Tyler" (PDF). British Birds. Retrieved 28 February 2018.
- 1 2 3 "Hugh's Wild West – Episode guide – BBC Two". BBC. Retrieved 28 February 2018.
- 1 2 3 "Citation for Steph Tyler" (PDF). Welsh Ornithological Society. 2015. Retrieved 28 February 2018.
- ↑ "Points of contact: Monmouthshire | Contacts & Links | SEWBReC". www.sewbrec.org.uk. Retrieved 28 February 2018.
- ↑ "Volunteer stories | BTO – British Trust for Ornithology". www.bto.org. 27 March 2014. Retrieved 28 February 2018.
- ↑ "History | BirdLife Botswana". www.birdlifebotswana.org.bw. Retrieved 3 July 2020.
- ↑ "About MMG". Monmouthshire Meadows. 13 January 2010. Retrieved 28 February 2018.
- ↑ "No. 63218". The London Gazette (Supplement). 31 December 2020. p. N24.
- ↑ "Medallists". British Trust for Ornithology. 8 December 2010. Retrieved 3 November 2023.
- ↑ Tyler, Stephanie J. (1972). "Breeding Biology of the Grey Wagtail". Bird Study. 19 (2): 69–80. Bibcode:1972BirdS..19...69T. doi: 10.1080/00063657209476328 . ISSN 0006-3657.
- ↑ Ormerod, S. J.; Tyler, Stephanie J. (1986). "The diet of Dippers Cinclus cinclus wintering in the catchment of the River Wye, Wales". Bird Study. 33 (1): 36–45. Bibcode:1986BirdS..33...36O. doi: 10.1080/00063658609476888 . ISSN 0006-3657.
- ↑ O'Halloran, J.; Gribbin, S. D.; Tyler, Stephanie J.; Ormerod, S. J. (1990). "The Ecology of Dippers Cinclus cinclus (L.) in Relation to Stream Acidity in Upland Wales: Time-Activity Budgets and Energy Expenditure". Oecologia. 85 (2): 271–280. Bibcode:1990Oecol..85..271O. doi:10.1007/BF00319413. ISSN 0029-8549. JSTOR 4219509. PMID 28312567. S2CID 13401661.
- ↑ Ormerod, S. J.; O'Halloran, J.; Gribbin, S. D.; Tyler, Stephanie J. (1991). "The Ecology of Dippers Cinclus cinclus in Relation to Stream Acidity in Upland Wales: Breeding Performance, Calcium Physiology and Nestling Growth". The Journal of Applied Ecology. 28 (2): 419. Bibcode:1991JApEc..28..419O. doi:10.2307/2404559. JSTOR 2404559.
- ↑ Ormerod, S. J.; Tyler, S. J. (1993). "Further studies of the organochlorine content of Dipper Cinclus cinclus eggs: local differences between Welsh catchments". Bird Study. 40 (2): 97–106. Bibcode:1993BirdS..40...97O. doi:10.1080/00063659309477134. ISSN 0006-3657.
- ↑ abc_admin (22 December 2012). "Birds in the Gaborone area and where to find them". African Bird Club. Retrieved 3 July 2020.
- ↑ Tyler, Stephanie J.; Tyler, Lindsay (2001). "Biometrics and moult data for nomadic Lark-like Buntings, Emberiza impetuani , in southeastern Botswana". Ostrich. 72 (1–2): 118–120. Bibcode:2001Ostri..72..118T. doi:10.2989/00306520109485297. ISSN 0030-6525. S2CID 86477323.
- ↑ Tyler, Stephanie J (2004). "The breeding and population status of the African Skimmer Rynchops flavirostris in Botswana". Ostrich. 75 (4): 329–332. Bibcode:2004Ostri..75..329T. doi:10.2989/00306520409485465. ISSN 0030-6525. S2CID 83736467.
- ↑ Hancock, Peter; Weiersbye, Ingrid (2016). Birds of Botswana. Princeton University Press. ISBN 978-0-691-15717-7. JSTOR j.ctt15hvxr0.
- ↑ Cumming, Graeme S.; Harebottle, Douglas M.; Mundava, Josphine; Otieno, Nickson; Tyler, Stephanie J. (2016). "Timing and location of reproduction in African waterfowl: an overview of >100 years of nest records". Ecology and Evolution. 6 (3): 631–646. Bibcode:2016EcoEv...6..631C. doi:10.1002/ece3.1853. PMC 4739573 . PMID 26865954.
- ↑ Tyler, Stephanie (4 March 2020), Billerman, Shawn M.; Keeney, Brooke K.; Rodewald, Paul G.; Schulenberg, Thomas S. (eds.), "Gray Wagtail (Motacilla cinerea)", Birds of the World, Cornell Lab of Ornithology, doi:10.2173/bow.grywag.01, S2CID 216277241 , retrieved 3 July 2020
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