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Bird
Birds (Aves) are a group of endothermic vertebrates, 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 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. They rank as the world’s most numerically-successful class of tetrapods, with approximately ten thousand living species, more than half of these being passerines, sometimes known as perching birds. Birds have wings which are more or less developed depending on the species; the only known groups without wings are the extinct moa and elephant birds. Wings, which evolved from forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in flightless birds, including ratites, penguins, and diverse endemic island species of birds
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Ordovician
The Ordovician
Ordovician
( /ɔːrdəˈvɪʃən/) is a geologic period and system, the second of six periods of the Paleozoic
Paleozoic
Era
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Precambrian
The Precambrian
Precambrian
(or Pre-Cambrian, sometimes abbreviated pЄ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic
Phanerozoic
Eon. The Precambrian
Precambrian
is so named because it preceded the Cambrian, the first period of the Phanerozoic
Phanerozoic
eon, which is named after Cambria, the Latinised name for Wales, where rocks from this age were first studied. The Precambrian
Precambrian
accounts for 88% of the Earth's geologic time. The Precambrian
Precambrian
(colored green in the timeline figure) is a supereon that is subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale
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Silurian
The Silurian
Silurian
is a geologic period and system spanning 24.6 million years from the end of the Ordovician
Ordovician
Period, at 443.8 million years ago (Mya), to the beginning of the Devonian
Devonian
Period, 419.2 Mya.[8] As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by several million years. The base of the Silurian
Silurian
is set at a series of major Ordovician–Silurian extinction events
Ordovician–Silurian extinction events
when 60% of marine species were wiped out. A significant evolutionary milestone during the Silurian
Silurian
was the diversification of jawed and bony fish
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Devonian
The Devonian
Devonian
is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, 419.2 million years ago (Mya), to the beginning of the Carboniferous, 358.9 Mya.[9] It is named after Devon, England, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. Various terrestrial arthropods also became well-established. Fish
Fish
reached substantial diversity during this time, leading the Devonian
Devonian
to often be dubbed the "Age of Fish"
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Permian
The Permian
Permian
is a geologic period and system which spans 46.7 million years from the end of the Carboniferous
Carboniferous
Period 298.9 million years ago (Mya), to the beginning of the Triassic
Triassic
period 251.902 Mya. It is the last period of the Paleozoic
Paleozoic
era; the following Triassic
Triassic
period belongs to the Mesozoic
Mesozoic
era. The concept of the Permian
Permian
was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the city of Perm. The Permian
Permian
witnessed the diversification of the early amniotes into the ancestral groups of the mammals, turtles, lepidosaurs, and archosaurs. The world at the time was dominated by two continents known as Pangaea
Pangaea
and Siberia, surrounded by a global ocean called Panthalassa
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Triassic
The Triassic
Triassic
( /traɪˈæsɪk/) is a geologic period and system which spans 50.9 million years from the end of the Permian
Permian
Period 251.9 million years ago (Mya), to the beginning of the Jurassic
Jurassic
Period 201.3 Mya.[8] The Triassic
Triassic
is the first period of the Mesozoic
Mesozoic
Era. Both the start and end of the period are marked by major extinction events.[9] The Triassic
Triassic
began in the wake of the Permian– Triassic
Triassic
extinction event, which left the earth's biosphere impoverished; it would take well into the middle of this period for life to recover its former diversity. Therapsids and archosaurs were the chief terrestrial vertebrates during this time
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Paleogene
The Paleogene (/ˈpæliədʒiːn, ˈpeɪliə-/; also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous
Cretaceous
Period 66 million years ago (Mya) to the beginning of the Neogene
Neogene
Period 23.03 Mya
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Avifauna (other)
Avifauna
Avifauna
most commonly refers to birds. Avifauna
Avifauna
may also refer to:
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Early Cretaceous
The Early Cretaceous/Middle Cretaceous
Cretaceous
(geochronological name) or the Lower Cretaceous
Cretaceous
(chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 146 Ma to 100 Ma. During this time many new types of dinosaurs appeared or came into prominence, including Psittacosaurus, spinosaurids, carcharodontosaurids and coelurosaurs, while survivors from the Late Jurassic
Jurassic
continued. Angiosperms (flowering plants)[2] appear for the first time. Also, Birds appear for the first time. See also[edit]Geology portal Palaeontology portal Time portalGeologic PeriodReferences[edit]^ http://www.stratigraphy.org/index.php/ics-chart-timescale ^ Sun, G., Q. Ji, D.L. Dilcher, S. Zheng, K.C. Nixon & X. Wang 2002. Archaefructaceae, a New Basal Angiosperm
Angiosperm
Family
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Taxonomy (biology)
Taxonomy (from Ancient Greek τάξις (taxis), meaning 'arrangement', and -νομία (-nomia), meaning 'method') is the science of defining and naming groups of biological organisms on the basis of shared characteristics. Organisms are grouped together into taxa (singular: taxon) and these groups are given a taxonomic rank; groups of a given rank can be aggregated to form a super-group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain, kingdom, phylum (division is sometimes used in botany in place of phylum), class, order, family, genus and species
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Cambrian
The Cambrian
Cambrian
Period ( /ˈkæmbriən/ or /ˈkeɪmbriən/) was the first geological period of the Paleozoic
Paleozoic
Era, of the Phanerozoic
Phanerozoic
Eon.[6] The Cambrian
Cambrian
lasted 55.6 million years from the end of the preceding Ediacaran
Ediacaran
Period 541 million years ago (mya) to the beginning of the Ordovician
Ordovician
Period 485.4 mya.[7] Its subdivisions, and its base, are somewhat in flux
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Carboniferous
The Carboniferous
Carboniferous
is a geologic period and system that spans 60 million years from the end of the Devonian
Devonian
Period 358.9 million years ago (Mya), to the beginning of the Permian
Permian
Period, 298.9 Mya
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Order (biology)
In biological classification, the order (Latin: ordo) isa taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family. An immediately higher rank, superorder, may be added directly above order, while suborder would be a lower rank. a taxonomic unit, a taxon, in that rank. In that case the plural is orders (Latin ordines).Example: All owls belong to the order Strigiformes.What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order
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Holocene
The Holocene
Holocene
( /ˈhɒləˌsiːn, ˈhoʊ-/)[2][3] is the current geological epoch. It began after the Pleistocene[4], approximately 11,650 cal years before present.[5] The Holocene
Holocene
is part of the Quaternary
Quaternary
period. Its name comes from the Ancient Greek
Ancient Greek
words ὅλος (holos, whole or entire) and καινός (kainos, new), meaning "entirely recent".[6] It has been identified with the current warm period, known as MIS 1, and is considered by some to be an interglacial period. The Holocene
Holocene
encompasses the growth and impacts of the human species worldwide, including all its written history, development of major civilizations, and overall significant transition toward urban living in the present
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10th Edition Of Systema Naturae
The 10th edition of Systema Naturae
Systema Naturae
is a book written by Carl Linnaeus and published in two volumes in 1758 and 1759, which marks the starting point of zoological nomenclature. In it, Linnaeus introduced binomial nomenclature for animals, something he had already done for plants in his 1753 publication of Species Plantarum.Contents1 Starting point 2 Revisions 3 Animals3.1 Mammalia 3.2 Aves 3.3 Amphibia 3.4 Pisces 3.5 Insecta 3.6 Vermes4 Plants 5 References 6 External linksStarting point[edit] Before 1758, most biological catalogues had used polynomial names for the taxa included, including earlier editions of Systema Naturae. The first work to consistently apply binomial nomenclature across the animal kingdom was the 10th edition of Systema Naturae
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