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Caw (sound)
''Corvus'' is a widely distributed genus of passerine birds ranging from medium-sized to large-sized in the family Corvidae. It includes species commonly known as crows, ravens, and rooks. The species commonly encountered in Europe are the carrion crow, hooded crow, common raven, and rook; those discovered later were named "crow" or "raven" chiefly on the basis of their size, crows generally being smaller. The genus name is Latin for "raven". The 46 or so members of this genus occur on all temperate continents except South America, and several islands. The ''Corvus'' genus makes up a third of the species in the family Corvidae. The members appear to have evolved in Asia from the corvid stock, which had evolved in Australia. The collective name for a group of crows is a "flock" or a "murder". Recent research has found some crow species capable of not only tool use, but also tool construction. Crows are now considered to be among the world's most intelligent animals with an e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rook (bird)
The rook (''Corvus frugilegus'') is a member of the family Corvidae in the passerine order of birds. It is found in the Palearctic, its range extending from Scandinavia and western Europe to eastern Siberia. It is a large, gregarious, black-feathered bird, distinguished from similar species by the whitish featherless area on the face. Rooks nest collectively in the tops of tall trees, often close to farms or villages; the groups of nests are known as rookeries. Rooks are mainly resident birds, but the northernmost populations may migrate southwards to avoid the harshest winter conditions. The birds form flocks in winter, often in the company of other '' Corvus'' species or jackdaws. They return to their rookeries, and breeding takes place in spring. They forage on arable land and pasture, probing the ground with their strong bills and feeding largely on grubs and soil-based invertebrates, but they also consume cereals and other plant material. Historically, farmers have accuse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crow On A Branch
A crow is a bird of the genus ''Corvus'', or more broadly, a synonym for all of ''Corvus''. The word "crow" is used as part of the common name of many species. The related term "raven" is not linked scientifically to any certain trait but is rather a general grouping for larger-sized species of ''Corvus''. The collective name for a group of crows is a "murder". Species * ''Corvus albus'' – Pied crow (Central African coasts to southern Africa) * ''Corvus bennetti'' – Little crow (Australia) * ''Corvus brachyrhynchos'' – American crow (United States, southern Canada, northern Mexico) * ''Corvus capensis'' – Cape crow or Cape rook (Eastern and southern Africa) * ''Corvus cornix'' – Hooded crow (Northern and Eastern Europe and Northern Africa and Middle East) * ''Corvus corone'' – Carrion crow (Europe and eastern Asia) *''Corvus culminatus'' – Indian jungle crow (South Asia) * ''Corvus edithae'' – Somali crow or dwarf raven (Eastern Africa) * ''Corvus enca'' – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Dimorphism
Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, dioecious species, which consist of most animals and some plants. Differences may include secondary sex characteristics, size, weight, color, markings, or behavioral or cognitive traits. Male-male reproductive competition has evolved a diverse array of sexually dimorphic traits. Aggressive utility traits such as "battle" teeth and blunt heads reinforced as battering rams are used as weapons in aggressive interactions between rivals. Passive displays such as ornamental feathering or song-calling have also evolved mainly through sexual selection. These differences may be subtle or exaggerated and may be subjected to sexual selection and natural selection. The opposite of dimorphism is ''monomorphism'', when both biological sexes are phenotype, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyrebird
A lyrebird is either of two species of ground-dwelling Australian birds that compose the genus ''Menura'', and the family Menuridae. They are most notable for their impressive ability to mimic natural and artificial sounds from their environment, and the striking beauty of the male bird's huge tail when it is fanned out in courtship display. Lyrebirds have unique plumes of neutral-coloured tailfeathers and are among Australia's best-known native birds. Taxonomy The classification of lyrebirds was the subject of much debate after the first specimens reached European scientists after 1798. Based on specimens sent from New South Wales to England, Major-General Thomas Davies illustrated and described this species as the superb lyrebird, which he called ''Menura superba'', in an 1800 presentation to the Linnean Society of London, but this work was not published until 1802; in the intervening time period, however, the species was described and named ''Menura novaehollandiae'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thick-billed Raven
The thick-billed raven (''Corvus crassirostris''), a corvid from the Horn of Africa, shares with the common raven the distinction of being the largest bird in the corvid family. The thick-billed raven averages in length, with a range of and weighs approximately in females and in males on average. Its size is about the same as the largest subspecies of common raven (i.e. those from the Himalayas and Greenland/ Canadian Northwest Atlantic) but some common raven subspecies are rather smaller and, going on average weights, the thick-billed raven is likely the heaviest extant passerine. The thick-billed raven is about 25% heavier on average than the Australasian superb lyrebird, which is sometimes erroneously titled the largest passerine.Madge, S. (2010). ''Crows and jays''. A&C Black. It has a very large bill that is laterally compressed and is deeply curved in profile giving the bird a very distinctive appearance. This bill, the largest of any passerine at in length, is blac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raven Scavenging On A Dead Shark
A raven is any of several large-bodied passerine bird species in the genus ''Corvus''. These species do not form a single taxonomic group within the genus. There is no consistent distinction between crows and ravens; the two names are assigned to different species chiefly by size. The largest raven species are the common raven and the thick-billed raven; these are also the largest passerine species. Etymology The term ''raven'' originally referred to the common raven (''Corvus corax''), the widespread species of the Northern Hemisphere. The modern English word ''raven'' has cognates in all other Germanic languages, including Old Norse (and subsequently modern Icelandic) and Old High German , all of which descend from Proto-Germanic . Collective nouns for a group of ravens include a "conspiracy", a "treachery", a "rave" and an "unkindness"; in practice, most people use the more generic "flock". Extant species * ''Corvus albicollis'' – White-necked raven (eastern and south ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flying Crow
Flying may refer to: * Flight, the process of flying * Aviation, the creation and operation of aircraft Music Albums * '' Flying (Cody Fry album)'', 2017 * ''Flying'' (Grammatrain album), 1997 * ''Flying'' (Jonathan Fagerlund album), 2008 * '' UFO 2: Flying'' (UFO album), 1971 * ''Flying'', by Bae Seul-ki * ''Flying'', by Chas & Dave * ''Flying'', by The Hometown Band Songs * "Flying" (Beatles song), 1967 * "Flying" (Bryan Adams song), 2004 * "Flying" (Cast song), 1996 * "Flying" (Chas & Dave song), 1982 * "Flying", by Anathema from '' A Natural Disaster'' * "Flying", by Badfinger from ''Straight Up'' * "Flying", by Cory Marks from the 2022 extended play ''I Rise'' * "Flying", by James Newton Howard from the film ''Peter Pan'' * "Flying", by Living Colour from ''Collideøscope'' * "Flying", by Stan Rogers from ''From Fresh Water'' * "Flyin'", by Prism from ''See Forever Eyes'' Other uses * ''Flying'' (magazine), a monthly publication * ''Flying'' (film), a 1986 drama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Encephalization Quotient
Encephalization quotient (EQ), encephalization level (EL), or just encephalization is a relative brain size measure that is defined as the ratio between observed and predicted brain mass for an animal of a given size, based on nonlinear regression on a range of reference species. It has been used as a proxy for intelligence and thus as a possible way of comparing the intelligence levels of different species. For this purpose, it is a more refined measurement than the raw brain-to-body mass ratio, as it takes into account allometric effects. Expressed as a formula, the relationship has been developed for mammals and may not yield relevant results when applied outside this group. Perspective on intelligence measures Encephalization quotient was developed in an attempt to provide a way of correlating an animal's physical characteristics with perceived intelligence. It improved on the previous attempt, brain-to-body mass ratio, so it has persisted. Subsequent work, notably R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Cognition
Animal cognition encompasses the mental capacities of non-human animals, including insect cognition. The study of animal conditioning and learning used in this field was developed from comparative psychology. It has also been strongly influenced by research in ethology, behavioral ecology, and evolutionary psychology; the alternative name cognitive ethology is sometimes used. Many behaviors associated with the term ''animal intelligence'' are also subsumed within animal cognition. Researchers have examined animal cognition in mammals (especially primates, cetaceans, elephants, bears, dogs, cats, pigs, horses, cattle, raccoons and rodents), birds (including parrots, fowl, corvids and pigeons), reptiles ( lizards, snakes, and turtles), fish and invertebrates (including cephalopods, spiders and insects). Historical background Earliest inferences The mind and behavior of non-human animals has captivated the human imagination for centuries. Many writers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tool Use By Animals
Tool use by non-humans is a phenomenon in which a non-human animal uses any kind of tool in order to achieve a goal such as acquiring food and water, Personal grooming, grooming, combat, defence, Animal communication, communication, Play (activity), recreation or animal architecture, construction. Originally thought to be a skill possessed only by humans, some tool use requires a sophisticated level of cognition. There is considerable discussion about the definition of what constitutes a tool and therefore which behaviours can be considered true examples of tool use. A wide range of animals, including mammals, birds, fish, cephalopods, and insects, are considered to use tools. Primates are well known for using tools for hunting or gathering food and water, cover for rain, and self-defence. Chimpanzees have often been the object of study in regard to their usage of tools, most famously by Jane Goodall, since these animals are frequently kept in captivity and are closely related t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collective Noun
In linguistics, a collective noun is a word referring to a collection of things taken as a whole. Most collective nouns in everyday speech are not specific to one kind of thing. For example, the collective noun "group" can be applied to people ("a group of people"), or dogs ("a group of dogs"), or objects ("a group of stones"). Some collective nouns are specific to one kind of thing, especially terms of venery, which identify groups of specific animals. For example, "pride" as a term of venery always refers to lions, never to dogs or cows. Other examples come from popular culture such as a group of owls, which is called a "parliament". Different forms of English handle verb agreement with collective count nouns differently. For example, users of British English generally accept that collective nouns take either singular or plural verb forms depending on context and the metonymic shift that it implies, while in some other forms of English the verb agreement is less flexible. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
