1500–800 BC – The Vedas mention the habit of brood parasitism in the Asian koel (Eudynamys scolopacea).
4th century BC – Aristotle mentions over 170 sorts of birds in his work on animals. He recognises eight principal groups.
3rd century BC – The Erya, a Chinese encyclopedia comprising glosses on passages in ancient texts, notably the Book of Songs, features 79 entries in its chapter "Describing Birds"
1st century AD – Pliny the Elder's Historia Naturalis Book X is devoted to birds. Three groups based on characteristics of feet
2nd century AD – Aelian mentions a number of birds in his work on animals. Birds are listed alphabetically
1037 Death of Abu ‘Ali al-Husayn ibn Abd Allah ibn Sina (known as Avicenna in Latin) author of Abbreviatio de animalibus, a homage to Aristotle
1220 – Books on birds and other animals by Aristotle and Avicenna translated into Latin for the first time by Michael Scot
1250 – Death of Frederick II von Hohenstaufen, Holy Roman Emperor, and author of de Arte Venandi cum Avibus ("concerning the art of hunting with birds") that describes the first manipulative experiments in ornithology and the methods of falconry
1478 – De Avibus by Albertus Magnus is printed, which mentions many bird names for the first time
1485 – First dated copy of Ortus sanitatis by Johannes de Cuba
1544 – William Turner prints a commentary on the birds mentioned by Aristotle and Pliny
1555 – Conrad Gessner's Historic Animalium qui est de Auium natura and Pierre Belon's (Bellonius) Histoire de la nature des Oyseaux. Belon lists birds according to a definite system
1573 – Volcher Coiter publishes his first treatise on bird anatomy
1596 – The Compendium of Chinese Materia Medica by Li Shizhen includes a total of 77 species of bird.
1600 – Beginning of the publication of the works of Ulisse Aldrovandi on birds.
1603 – Caspar Schwenckfeld publishes the first regional fauna of Europe: Therio-tropheum Silesiae.
1605 – Clusius publishes Exoticorum libri decem ("Ten books of exotics") in which he describes many new exotic species.
1609 – The illustrated Sancai Tuhui, a Chinese encyclopedia by Wang Qi & Wang Siyi, lists a total of 113 species of bird.
1638 – Georg Marcgraf begins a voyage to Brazil where he studies the fauna and flora.
1652 – Leopoldina founded in the Holy Roman Empire. It is the oldest continuously existing learned society in the world.
1655 – Ole Worm collects a famous cabinet of curiosities whose illustrated inventory appears in 1655, Museum Wormianum. This collection comprises many birds but the techniques of conservation are not successful and they are quickly destroyed by insects.
1657 – Publication of Historiae naturalis de avibus by John Jonston.
1667 – Christopher Merrett publishes the first fauna of Great Britain, followed two years later by that of Walter Charleton.
1676 – Publication of Francis Willughby's Ornithologia by his collaborator John Ray. This is considered the beginning of scientific ornithology in Europe, revolutionizing ornithological taxonomy by organizing species according to their physical characteristics
1681 – The last dodo dies on the island of Mauritius
1724–1726 – François Valentijn and George Eberhard Rumpf give the first accounts of birds-of-paradise in Oud en Nieuw Oost-Indiën ("Old and New East India")
1731–1738 Eleazar Albin publishes A Natural History of Birds
1731–1743 – Mark Catesby publishes his Natural History of Carolina, which contains coloured plates of the birds of that colony, Florida and the Bahamas
1737 – Giuseppe Zinanni writes the first book entirely devoted to the eggs and nests of birds, Dell Uova Nidi e dei degli Uccelli published in Venice
1741 – Georg Steller studies the birds of the north Pacific on his voyage with Vitus Bering
1742–1743 – Johann Heinrich Zorn publishes Petino-Theologie oder Versuch, Die Menschen durch nähere Betrachtung Der Vögel Zur Bewunderung Liebe und Verehrung ihres mächtigsten, weissest- und gütigsten Schöpffers aufzumuntern. Ornithotheology, or an encouragement to humanity, through a careful observation of birds, towards admiration, love and respect for their powerful, of the wise and good Creator.
1743 – George Edwards begins publication of his bird plates
1744 – Louisa Ulrika of Prussia becomes Queen of Sweden. She is a patron of Linnaeus.
1774 – Jacob Christian Schäffer divides the birds into two families, Palmipedes (web-footed) and the much larger family Nudipedes (not web-footed) in Elementa Ornithologica.
1775 – Ashton Lever begins exhibiting his bird collection at a public museum called the Holophusikon
1776 – Peter Brown publishes New illustrations of Zoology
1778 – Juan Ignacio Molina publishes Saggio sulla storia naturale del Chile which includes the first descriptions of many South American species
1778–1785 Félix Vicq-d'Azyr begins Mémoires pour servir à l'anatomie des oiseaux in Mémoires de l'Académie Royale des Sciences
1779–1780 Johann Friedrich Blumenbach Handbuch der Naturgeschichte; 12 editions and some translations. Published first in Göttingen by J. C. Dieterich
1780 Lazzaro SpallanzaniDissertationi di fisica animale e vegetale published. It includes investigations into bird physiology.
1782 – Pierre Joseph Buchoz Les dons merveilleux et diversement coloriés de la nature dans le règne animal, ou collection d’animaux précieusement coloriés (Paris : chez l'auteur)
1785 – John Latham completes his Synopsis of Birds, which describes many birds collected in Australia and the Pacific Ocean. Thomas Pennant publishes Arctic Zoology.
1786–1789 – Anders Erikson Sparrman publishes Catalogue of the Museum Carlsonianum in which he described many of the specimens he had collected in South Africa and the South Pacific, some of which were new to science. In 1806 he published an Ornithology of Sweden
1788 – Johann Friedrich Gmelin commences work on the 13th edition of Systema Naturae which includes the classification of many birds for the first time, especially those described by Latham
1788 – “de Arte Venandi cum Avibus” by Frederick II (d. 1250) published and compared favorably to contemporary science by Blasius Merrem and Johan Gottlobb Schneider
1789 – Publication of Gilbert White's Natural History and Antiquities of Selborne
1789–1813 – George Shaw commences The Naturalist's Miscellany or Coloured Figures Of Natural Objects; Drawn and Described Immediately From Nature
1797 – François Le Vaillant begins publication of his Oiseaux d'Afrique giving details of species encountered on his exploration of South Africa. This work was translated into several languages and established his fame as a bird artist.
1799 – François Marie Daudin writes Traité élémentaire et complet d'Ornithologie (Natural History of Birds), one of the first "modern" handbooks of ornithology, combining Linnean binomial nomenclature with the anatomical and physiological descriptions of Buffon. Unfortunately it was never completed.
1799 – Philippe-Isidore Picot de Lapeyrouse publishes Tables méthodiques des mammifères et des oiseaux observés dans le département de la Haute-Garonne. Also Bernard Germain de Lacépède, in Discours d'ouverture et de clôture du cours d'histoire naturelle, places the birds in 130 genera in 39 orders.
1799 – Alexander von Humboldt journeys to South America where he finds the oilbird. He described it in 1817. Later in the trip he observed the behaviour of the Andean condor
19th century
1800–1804 – "Le Geographe" and "Le Naturaliste" leave France for the Pacific ocean under the overall command of Nicolas Baudin. The naturalists on board made a collection of over 100,000 zoological specimens. Many bird species will be described by Louis Jean Pierre Vieillot and published in Nouveau dictionnaire d'histoire naturelle (1816–1819).
1800–1817 – Johann Conrad Susemihl publishes a 22-part survey of the birds of Germany, Teutsche Ornithologie oder Naturgeschichte aller Vögel Teutschlands in naturgetreuen Abbildungen und Beschreibungen.
1801 – Alexander Wilson begins his study of North American birds, resulting in his American Ornithology (1808–1814), completed by George Ord, and later updated by Charles Lucien Bonaparte.
1802 – Publication of George Montagu's Ornithological Dictionary. In this year also Histoire des colibris, oiseaux-mouches, jacamars et promerops by Jean Baptiste Audebert was published two years after his death.
1802 – Louis Dufresne popularizes the use of arsenical soap for preserving birds, a technique which had enabled the Museum d'Histoire Naturelle in Paris to build the greatest collection of birds in the world
1804– 1806 – Lewis and Clark Expedition. This was the first overland expedition undertaken by the United States to the Pacific coast and back. The many birds seen include Steller's jay and greater prairie chicken.
1805 – Johann Fischer von Waldheim founded the Imperial Society of Naturalists of Moscow.
1806 – Sébastien Gérardin publishes Tableau élémentaire d'ornithologie, ou Histoire naturelle des oiseaux que l'on rencontre communément en France
1811 – Publication of Peter Simon Pallas' Zoographia Russo-Asiatica includes details of the birds encountered in his journeys through Siberia
1811 – Marie Jules Cesar Lelorgne de Savigny publishes Système des oiseaux de l'Égypte et de la Syrie
1811 – Johann Karl Wilhelm Illiger published Prodromus systematis mammalium et avium in which he proposed the review of the Linnean system and firmly established the concept of the Family earlier proposed by François Marie Daudin. Illiger is considered the founder of the School of Nomenclatural Purists.
1820–1844 – Johann Friedrich Naumann publishes Naturgeschichte der Vögel Deutschlands, The Natural History of German Birds
1820–23 – Encouraged by William Elford LeachWilliam John Swainson became the first illustrator and naturalist to use lithography for his Zoological Illustrations a relatively cheap work which did not require an engraver.
(1826–39) – René Primevère Lesson writes the vertebrate zoological section of Voyage au tour du monde sur La Coquille. Lesson was the first naturalist to see live birds of paradise in the Moluccas and New Guinea.
1826–1829 – Jules Dumont d'Urville commands the first voyage of the Astrolabe. Zoological specimens from the South Pacific are collected for the Muséum national d'histoire naturelle in Paris. These include many birds.
1826–1829 – Russian Senjawin expedition. Heinrich von Kittlitz collects 754 specimens of 314 bird species, including unique specimens of species that subsequently became extinct to the museum of the Russian Academy of Sciences.
1828 – Roret, (Libraire) publish the second edition of Pierre Boitard and Emmanuel Canivet Manuel du naturaliste préparateur ou l’art d’empailler les animaux et de conserver les végétaux et les minéraux
1831–1836 – Charles Darwin travels to South America and the Galapagos Islands on board HMS Beagle. His study of Galapagos finches gives him ideas on natural selection
1832 – Edward Lear publishes Illustrations of the Family of the Psittacidae, or Parrots
1840 – Luigi Benoit publishes Ornitologia Siciliana
1843 – William Yarrell publishes History of British Birds as a whole in three volumes. It first appeared in parts of 3 sheets every 2 months from 1837 onwards.
1843–1849 – Artwork and scientific notes for John Cotton's Birds of the Port Phillip District of New South Wales gathered.
1857 – Philip Sclater presents his paper (published in 1858) "On the General Geographical Distribution of the Members of the Class Aves" to the Linnean Society, setting up six zoological regions which he called the Palaearctic, Aethiopian, Indian, Australasian, Nearctic and Neotropical. They are still in use.
1861 – Fossil of Archaeopteryx found in Germany supports link between dinosaurs and birds.
1861 – Museum Godeffroy founded in Hamburg. The museum is devoted to the zoology and ethnography of the South Seas and Australia.
1864 – Illustrirtes Tierleben commenced
1866 – August Emil Holmgren Skandinaviens foglar (Birds of Scandinavia)
1868 – Association for the Protection of Sea-Birds formed in England
1868 – Bernard Altum publishes Der Vogel und sein Leben (Birds and their lives)
1868–1882 – José Vicente Barbosa du Bocage begins Aves das possessões portuguesas d’ Africa occidental que existem no Museu de Lisboa, da 1ª à 24ª lista 1868 a 1882.
1873 – Publication of Ornitologia Italiana by Paolo Savi
1873 – Biophysicist Hermann von Helmholtz develops a mathematical law of bird flight.
1874 – Richard Bowdler Sharpe publishes the first of a series of catalogues of birds in the collection of the British Museum.
1876 – Friedrich Brüggeman publishes Beiträge zur Ornithologie von Celebes und Sangir.
1877 – Émile Oustalet and Armand David publish Les Oiseaux de la Chine.
1879 – Richard Owen publishes the results of his studies of moa fossils.
1879 – Tommaso Salvadori publishes Ornitologia della Papuasia e delle Molucche. Torino.
1880 – Percy Evans Freke 1880 A comparative catalogue of birds found in Europe and North America. The Scientific proceedings of the Royal Dublin Society.
1881 – Kōno Bairei publishes Album of One Hundred Birds.
1883 – Foundation of the American Ornithologists' Union
1888 – Max Fürbringer uses a mathematical analysis to create a classification system for birds that influences avian taxonomy throughout the 20th century
1889 – The Imperial Natural History Museum opens in Vienna. The collections are vast, partly due to Empress Maria Theresa having encouraged science in the middle of the previous century, influenced and instructed by her personal physician Gerard van Swieten.
1889 – Charles B. Cory publishes The Birds of the West Indies
1892 – Walter Rothschild opens a private museum in Tring. It housed one of the largest natural history collections in the world.
1894 – Although Ignazio Porro had invented binoculars in 1859, high quality binoculars were first on sale in 1894, after the optical designs of Ernst Abbe were combined with the production techniques of Carl Zeiss. Binoculars revolutionised bird identification and field observation.
1895 – Emil Weiske begins collecting in New Guinea.
1896 – Valentin Lvovich Bianchi becomes head of the Department of Ornithology at the Imperial Academy of Sciences of Petrograd.
1900 – Ernst Hartert monographs the Trochilidae in volume 9 of the series Das Tierreich (the Animal Kingdom) published in Berlin by R. Friedländer und Sohn
1900 – Edmond de Sélys Longchamps bird collection given to the Royal Belgian Institute of Natural Sciences
1905–1906 – Bror Yngve SjöstedtWissenschaftliche Ergebnisse der Schwedischen Zoologischen Expedition nach dem Kilimandjaro, dem Meru und umgebenden Massaisteppen Deutsch-Ostafrikas.
1907 – The monthly journal British Birds begins publication
1907 – Kurt Floericke becomes the editor of Kosmos – Die Zeitschrift für alle Freunde der Natur or Magazine for the Friends of Nature
1910–1913 – Edward Adrian Wilson is the zoologist on the Terra Nova Expedition. He died with the rest of the party but in 1987 Edward Wilson's Birds of the Antarctic was edited by Brian Roberts and posthumously published
1912 – A barn swallow ringed by James Masefield in Staffordshire, England is recovered in Natal, South Africa
1916 – Marion Ellis Rowan paints birds on the first of many trips to New Guinea.
1918–1949 – Carl Eduard Hellmayr ends the chaos of systematic and nomenclatural confusion created by previous ornithologists working on South American birds in Catalogue of Birds of the Americas. It takes four decades and fifteen volumes.
1921–1932 The Whitney South Sea Expedition visits islands in the south Pacific region collecting over 40,000 bird specimens. The expedition also seals the extinction of the Guadalupe caracara
1922 – Foundation of the International Council for Bird Preservation (now BirdLife International)
1922 – Publication of John Charles Phillips's A Natural History of the Ducks, which provides maps of the known breeding and wintering distributions of ducks throughout the world
1922 William Rowan tests the effect of photoperiodism on the size of gonads in birds
1925 – Perrine Millais Moncrieff publishes a field guide New Zealand Birds and How to Identify Them.
1927 – Frédéric Courtois publishes Les oiseaux du musée de Zi-Kia-Wei
1928 – Ernst Mayr leads the first of three expeditions to New Guinea and the Solomon Islands, during which he discovers many new species
1929 – Conte Arrigoni degli Oddi publishes Ornitologia Italiana.
1932 – Yoshimaro Yamashina founds the Yamashina Institute for Ornithology at his home in Shibuya, Tokyo. His research centred on the use of the chromosomes of bird to distinguish species (and, later, DNA).
1933 – Nagamichi Kuroda publishes Birds of the Island of Java (2 Volumes, 1933–36)
1934 – Roger Tory Peterson publishes his Guide to the Birds, the first modern field guide
1934-37 - Brian Roberts is the expedition ornithologist on John Rymill's British Graham Land Expedition (BGLE)
1935 – Konrad Lorenz publishes his study of imprinting in young ducklings and goslings
1948 – IUCN Red List of Threatened Species founded as conservation concerns grow.
1950–2000
1950 – Rocket nets developed by the Wildfowl Trust for catching geese
1950 – Willi Hennig publishes Grundzüge einer Theorie der phylogenetischen Systematik (Basic outline of a theory of phylogenetic systematics). This work, at first obscure and controversial, founds cladistics and is mainstream by 1980.
1951–1954 – The six volume Birds of the Soviet Union by GP Dementev and NA Gladkov published
1953 – Niko Tinbergen publishes The Herring Gull's World
1953 – Ornithologist Olivier Messiaen composes the orchestral work Réveil des oiseaux—based on birdsong in the Jura Mountains.
1954 – Protection of Birds Act 1954 in the UK prohibits the collection of birds' eggs
1954 – The Heinz Sielmann film Zimmerleute des Waldes (Carpenters of the forest) shown on UK television with the title Woodpecker. It was a huge success.
1954 – First edition of Avian Physiology published by Paul D. Sturkie. The work related mainly to domestic birds and especially poultry, but later editions of the work, now titled Sturkie's Avian Physiology include studies of wild birds.
1954 – Arthur Cain refers to the "circular overlaps" of Mayr (1942) as ring species in Animal species and evolution'
1961 – Nature photographer Sakae Tamura publishes Tamagawa no tori, (Birds of River Tama, Tokyo)
1961 – Eric Hosking publishes Bird Photography as a Hobby, popularising bird photography.
1961 – William Homan Thorpe publishes Bird-Song. The biology of vocal communication and expression in birds pioneering the use of sound spectrography in bird studies.
1970 – The Atlas of Breeding Birds of the West Midlands by Lord and Munns, based on field work by members of the West Midland Bird Club, published by Collins, is the first to use systematic grid-based method for gathering of information.
1970 – Derek Ratcliffe discovers changes attributable to pesticides in egg breakage frequency and eggshell thickness in some British birds and publishes a paper so titled in the Journal of Applied Ecology
1971–1973 – Hans-Wilhelm Koepcke combines many biological concepts in Die Lebensformen: Grundlagen zu einer universell gültigen biologischen Theorie in English, Life Forms: The basis for a universally valid biological theory. Birds, and Peruvian or South American birds especially figure prominently.
1981 – Cyril A. Walker describes the Enantiornithes, a new subclass of fossil birds [Walker CA (1981) New subclass of birds from the Cretaceous of South America. Nature 292:51–53.]
1984 – Publication of The Atlas of Australian Birds
1991 – First new species described without a skin as a type specimen. The Bulo Burti boubou (Laniarius liberatus) of Somalia described on basis of DNA sequence from a feather.
1991 – A color atlas of avian anatomy by John McLelland explores the external features, skeleton, and body systems of birds
1992 – Publication of the Handbook of Birds of the World series starts
1992 – Avibase database commenced by Bird Studies Canada. At 2010 the database holds 5 million records of 10,000 species (22,000 subspecies) and has online World checklists, taxonomic notes and multilingual synonyms.
1993 – Vision, brain, and behavior in birds by H Philip Zeigler and Hans-Joachim Bischof published
1994 – Jonathan Weiner publishes The Beak of the Finch: A Story of Evolution in Our Time
1995 – Hou Lianhai describes the Confuciusornis, a new subclass of birds, from a fossil found in the Jinzhou market, Liaoning, China
1997 – Use of stable hydrogen isotope signatures in feathers to identify origin of birds.
1998 – Discovery of gut reduction before migration in godwits.
1998 – Alison J. Stattersfield, Michael J. Crosby, Adrian J. Long, and David C. Wege publish Endemic Bird Areas of the World: Priorities for Biodiversity Conservation
1998 – Katala Foundation commences the Philippine Cockatoo Conservation Programme.
1999 – Alan Feduccia publishes The Origin and Evolution of Birds arguing against the view that birds originated from and are deeply nested within Theropoda (and are therefore living theropod dinosaurs).
21st century
2000 – Harold Lisle Gibbs, Michael D. Sorenson, Karen Marchetti, Nick Davies, M. de L. Brooke and Hiroshi Nakamura provide genetic evidence for female host-specific races of the common cuckoo
2002 – Peter Bennett and Ian Owens publish Evolutionary Ecology of Birds: Life Histories, Mating systems, and Extinction
2003 – Michael D. Sorenson, Elen Oneal, Jaime García-Moreno and David P. Mindell discuss the enigmatic hoatzin without reaching a conclusion in a paper entitled "More Taxa, More Characters: The Hoatzin Problem Is Still Unresolved."
2004 – Thomas J.Hopp and Mark J. discover oviraptorosaur specimens in a nesting position similar to that of modern birds. The arms of these specimens are positioned in such a way that they could perfectly cover their eggs if they had small wings and a substantial covering of feathers.
2004 – Proposal to identify bird species through DNA sequence by Hebert PDN et al. using method termed as DNA barcoding.
2004 – Sandy Podulka, Ronald W. Rohrbaugh, Jr., and Rick Bonney edit second edition of Handbook of Bird Biology.