|
Bird Of Prey
Birds of prey or predatory birds, also known as (although not the same as) raptors, are hypercarnivorous bird species that actively predation, hunt and feed on other vertebrates (mainly mammals, reptiles and smaller birds). In addition to speed and strength, these predators have bird vision, keen eyesight for detecting prey from a distance or during flight, strong feet with sharp talon (anatomy), talons for grasping or killing prey, and powerful, curved beaks for tearing off flesh. Although predatory birds primarily hunt live prey, many species (such as fish eagles, vultures and condors) also scavenge and eat carrion. Although the term "bird of prey" could theoretically be taken to include all birds that actively hunt and eat other animals, ornithologists typically use the narrower definition followed in this page, excluding many piscivorous predators such as storks, Crane (bird), cranes, herons, gulls, skuas, penguins, and kingfishers, as well as many primarily insectivorous bir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurasian Eagle-owl
The Eurasian eagle-owl (''Bubo bubo'') is a species of eagle-owl, a type of bird that resides in much of Eurasia. It is often just called the eagle-owl in Europe and Asia. It is one of the largest species of owl. Females can grow to a total length of , with a wingspan of . Males are slightly smaller.''Owls of the World: A Photographic Guide'' by Mikkola, H. Firefly Books (2012), This bird has distinctive ear tufts, with upper parts that are mottled with darker blackish colouring and tawny. The wings and tail are barred. The underparts are a variably hued buff, streaked with darker colouring. The facial disc is not very defined. The orange eyes are distinctive.Penteriani, V., & del Mar Delgado, M. (2019). ''The eagle owl''. Bloomsbury Publishing. At least 12 subspecies of the Eurasian eagle-owl are described. Eurasian eagle-owls are found in many habitats; mostly Mountain ecosystems, mountainous and Rock (geology), rocky areas, often near varied woodland edge and near shrubby a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Vision
Vision is the most important sense for birds, since good eyesight is essential for safe flight. Birds have a number of adaptations which give visual acuity superior to that of other vertebrate groups; a pigeon has been described as "two eyes with wings". Birds are theropods,"Avian Visual Cognition", Edited and Published by Dr. Robert G. Cook, Dept. of Psychology, Tufts University. In cooperation with Comparative Cognition Press (September, 2001), http://www.pigeon.psy.tufts.edu/avc/husband/avc3dino.htm and the avian eye resembles that of other sauropsids, with ciliary muscles that can change the shape of the Lens (anatomy), lens rapidly and to a greater extent than in the mammals. Birds have the largest eyes relative to their size in the animal kingdom, and movement is consequently limited within the eye's bony socket. In addition to the two eyelids usually found in vertebrates, bird's eyes are protected by a third transparent movable membrane. The eye's internal anatomy is similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gull
Gulls, or colloquially seagulls, are seabirds of the subfamily Larinae. They are most closely related to terns and skimmers, distantly related to auks, and even more distantly related to waders. Until the 21st century, most gulls were placed in the genus ''Larus'', but that arrangement is now considered polyphyletic, leading to the resurrection of several genera. An older name for gulls is mews; this still exists in certain regional English dialects and is cognate with German , Danish ', Swedish ', Dutch ', Norwegian ', and French '. Gulls are usually grey or white, often with black markings on the head or wings. They normally have harsh wailing or squawking calls, stout bills, and webbed feet. Most gulls are ground-nesting piscivores or carnivores which take live food or scavenge opportunistically, particularly the ''Larus'' species. Live food often includes crustaceans, molluscs, fish and small birds. Gulls have unhinging jaws that provide the flexibility to consume large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heron
Herons are long-legged, long-necked, freshwater and coastal birds in the family Ardeidae, with 75 recognised species, some of which are referred to as egrets or bitterns rather than herons. Members of the genus ''Botaurus'' are referred to as bitterns, and, together with the zigzag heron, or zigzag bittern, in the monotypic genus ''Zebrilus'', form a monophyletic group within the Ardeidae. Egrets do not form a biologically distinct group from herons, and tend to be named differently because they are mainly white or have decorative plumes in breeding plumage. Herons, by evolutionary adaptation, have long beaks. The classification of the individual heron/egret species is fraught with difficulty, and no clear consensus exists about the correct placement of many species into either of the two major genera, ''Ardea (genus), Ardea'' and ''Egretta''. Similarly, the relationships of the genus, genera in the family are not completely resolved. However, one species formerly considered to c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crane (bird)
Cranes are a type of large bird with long legs and necks in the Family (biology), biological family Gruidae of the Order (biology), order Gruiformes. The family has 15 species placed in four genera which are ''Antigone (genus), Antigone'', ''Balearica'', ''Siberian crane, Leucogeranus'', and ''Grus (genus), Grus''. They are large birds with long necks and legs, a tapering form, and long secondary feathers on the wing that project over the tail. Most species have muted gray or white plumages, marked with black, and red bare patches on the face, but the crowned cranes of the genus ''Balearica'' have vibrantly-coloured wings and golden "crowns" of feathers. Cranes fly with their necks extended outwards instead of bent into an S-shape and their long legs outstretched. Cranes live on most continents, with the exception of Antarctica and South America. Some species and populations of cranes bird migration, migrate over long distances; others do not migrate at all. Cranes are solitary du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stork
Storks are large, long-legged, long-necked wading birds with long, stout bills. They belong to the family Ciconiidae, and make up the order Ciconiiformes . Ciconiiformes previously included a number of other families, such as herons and ibises, but those families have been moved to other orders. Storks dwell in many regions and tend to live in drier habitats than the closely related herons, spoonbills and ibises; they also lack the powder down that those groups use to clean off fish slime. Bill-clattering is an important mode of communication at the nest. Many species are migratory. Most storks eat frogs, fish, insects, earthworms, small birds and small mammals. There are 20 living species of storks in six genera. Various terms are used to refer to groups of storks, two frequently used ones being a ''muster'' of storks and a ''phalanx'' of storks. Storks tend to use soaring, gliding flight, which conserves energy. Soaring requires thermal air currents. Ottomar Ansch� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piscivorous
A piscivore () is a carnivorous animal that primarily eats fish. Fish were the diet of early tetrapod evolution (via water-bound amphibians during the Devonian period); insectivory came next; then in time, the more terrestrially adapted reptiles and synapsids evolved herbivory. Almost all predatory fish (most sharks, tuna, billfishes, pikes etc.) are obligated piscivores. Some non-piscine aquatic animals, such as whales, sea lions, and crocodilians, are not completely piscivorous; often also preying on invertebrates, marine mammals, waterbirds and even wading land animals in addition to fish, while others, such as the bulldog bat and gharial, are strictly dependent on fish for food. Some creatures, including cnidarians, octopuses, squid, cetaceans, spiders, grizzly bears, jaguars, wolves, snakes, turtles and sea gulls, may have fish as significant if not dominant portions of their diets. Humans can live on fish-based diets, as can their carnivorous domesticated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithologists
__NOTOC__ This is a list of ornithologists who have articles, in alphabetical order by surname. See also :Ornithologists. A * John Abbot – US * Clinton Gilbert Abbott – US * William Louis Abbott – US * Humayun Abdulali — India * Joseph H. Acklen – US * Humayun Abdulali – India * Jon E. Ahlquist – US * Prince Akishino (皇嗣秋筱宮文仁親王) – Japan * Luigi d'Albertis – Italy * John Warren Aldrich – US * Boyd Alexander – England * Christopher James Alexander – England * Horace Alexander – England/US *Wilfred Backhouse Alexander – England * Salim Ali – India * Arthur Augustus Allen – US * Elsa Guerdrum Allen – US * Glover Morrill Allen – US *Joel Asaph Allen – US * Robert Porter Allen – US * György Almásy – Hungary/Austria * Per Alström – Sweden * Bernard Altum – Germany * Dean Amadon – US * George W. Archibald – Canada/US * John Ash – England * Edwin Ashby – Australia * Henry Philemon Attwater – England/Canada/US * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carrion
Carrion (), also known as a carcass, is the decaying flesh of dead animals. Overview Carrion is an important food source for large carnivores and omnivores in most ecosystems. Examples of carrion-eaters (or scavengers) include crows, vultures, humans, hawks, eagles, hyenas, Virginia opossum, Tasmanian devils, coyotes and Komodo dragons. Many invertebrates, such as the Silphidae, carrion and burying beetles, as well as maggots of Calliphoridae, calliphorid flies (such as one of the most important species in ''Calliphora vomitoria'') and Flesh-fly, flesh-flies, also eat carrion, playing an important role in recycling nitrogen and carbon in animal remains. Carrion begins to decay at the moment of the animal's death, and it will increasingly attract insects and breed bacteria. Not long after the animal has died, its body will begin to exude a foul odor caused by the presence of bacteria and the emission of cadaverine and putrescine. Carrion can harbor many infectious and diseas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scavenge
Scavengers are animals that consume dead organisms that have died from causes other than predation or have been killed by other predators. While scavenging generally refers to carnivores feeding on carrion, it is also a herbivorous feeding behavior. Scavengers play an important role in the ecosystem by consuming dead animal and plant material. ''Decomposers'' and detritivores complete this process, by consuming the remains left by scavengers. Scavengers aid in overcoming fluctuations of food resources in the environment. The process and rate of scavenging is affected by both biotic and abiotic factors, such as carcass size, habitat, temperature, and seasons. Etymology Scavenger is an alteration of ''scavager,'' from Middle English ''skawager'' meaning "customs collector", from ''skawage'' meaning "customs", from Old North French ''escauwage'' meaning "inspection", from ''schauwer'' meaning "to inspect", of Germanic origin; akin to Old English ''scēawian'' and German '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Condor
Condor is the common name for two species of New World vultures, each in a monotypic genus. The name derives from the Quechua language, Quechua ''kuntur''. They are the largest flying land birds in the Western Hemisphere. One species, the Andean condor (''Vultur gryphus''), inhabits the Andean mountains. The other, the California condor (''Gymnogyps californianus''), is currently restricted to the Pacific Coast Ranges, western coastal mountains of the contiguous United States and Mexico, as well as the northern desert mountains of Arizona. Taxonomy Condors are part of the family Cathartidae, which contains the New World vultures, whereas the 15 species of Old World vultures are in the family Accipitridae, which also includes hawks, eagles, and Kite (bird), kites. The New World and Old World vultures evolved from different ancestors. They both are carrion-eaters and the two groups are similar in appearance due to convergent evolution. Description Condors are very large, broa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulture
A vulture is a bird of prey that scavenges on carrion. There are 23 extant species of vulture (including condors). Old World vultures include 16 living species native to Europe, Africa, and Asia; New World vultures are restricted to North and South America and consist of seven identified species, all belonging to the Cathartidae family. A particular characteristic of many vultures is a bald, unfeathered head. This bare skin is thought to keep the head clean when feeding, and also plays an important role in thermoregulation. Vultures have been observed to hunch their bodies and tuck in their heads in the cold, and open their wings and stretch their necks in the heat. They also urinate on themselves as a means of cooling their bodies. A group of vultures in flight is called a "kettle", while the term "committee" refers to a group of vultures resting on the ground or in trees. A group of vultures that are feeding is termed a "wake". Taxonomy Although New World vulture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
