Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Bird> ?p ?o }
- Bird abstract "Birds (class Aves) are a group of endothermic vertebrates, characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong 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 class of tetrapods with the most living species, at approximately ten thousand, with more than half of these being passerines, sometimes known as perching birds or, less accurately, as songbirds.The fossil record indicates that birds are the last surviving dinosaurs, having evolved from feathered ancestors within the theropod group of saurischian dinosaurs. True birds first appeared during the Cretaceous period, around 100 million years ago, and the last common ancestor is estimated to have lived about 95 million years ago. DNA-based evidence finds that birds radiated extensively around the time of the Cretaceous–Paleogene extinction event that killed off the non-avian dinosaurs. Birds in South America survived this event and then migrated to other parts of the world via multiple land bridges while diversifying during periods of global cooling. Primitive bird-like \"stem-birds\" that lie outside class Aves proper, in the group Avialae, have been found dating back to the mid-Jurassic period. Many of these early stem-birds, such as Archaeopteryx, were not yet capable of fully powered flight, and many retained primitive characteristics like toothy jaws in place of beaks and long bony tails.Birds have wings which are more or less developed depending on the species; the only known groups without wings are the extinct moas and elephant birds. Wings, which evolved from forelimbs, give most birds the ability to fly, although further speciation has led to some flightless birds, including ratites, penguins, and diverse endemic island species of birds. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly the aforementioned flightless penguins, and also members of the duck family, have also evolved for swimming. Birds, specifically Darwin's finches, played an important part in the inception of Darwin's theory of evolution by natural selection.Some birds, especially corvids and parrots, are among the most intelligent animals; several bird species make and use tools, and many social species pass on knowledge across generations, which is considered a form of culture. Many species annually migrate great distances. Birds are social, communicating with visual signals, calls, and bird songs, and participating in such social behaviours as cooperative breeding and hunting, flocking, and mobbing of predators. The vast majority of bird species are socially monogamous, usually for one breeding season at a time, sometimes for years, but rarely for life. Other species have polygynous (\"many females\") or, rarely, polyandrous (\"many males\") breeding systems. Birds produce offspring by laying eggs which are fertilized through sexual reproduction. They are usually laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching. Some birds, such as hens, lay eggs even when not fertilized, though unfertilized eggs do not produce offspring.Many species of birds are economically important. Domesticated and undomesticated birds (poultry and game) are important sources of eggs, meat, and feathers. Songbirds, parrots, and other species are popular as pets. Guano (bird excrement) is harvested for use as a fertilizer. Birds prominently figure throughout human culture. About 120–130 species have become extinct due to human activity since the 17th century, and hundreds more before then. Human activity threatens about 1,200 bird species with extinction, though efforts are underway to protect them. Recreational birdwatching is an important part of the ecotourism industry.".
- Bird soundRecording Bird__1.
- Bird thumbnail Bird_Diversity_2013.png?width=300.
- Bird wikiPageExternalLink birdbiogeography1.htm.
- Bird wikiPageExternalLink sora.unm.edu.
- Bird wikiPageExternalLink www.birdlife.org.
- Bird wikiPageExternalLink ibc.lynxeds.com.
- Bird wikiPageExternalLink bix-idx?c=bix;cc=bix;sid=0c4f6243857204b94fcdebc6dce5d8b2;type=simple;page=browse;inst=bix_10;sort=region.
- Bird wikiPageExternalLink index.html.
- Bird wikiPageExternalLink www.birdpop.org.
- Bird wikiPageExternalLink www.birds.cornell.edu.
- Bird wikiPageExternalLink birdsindex.htm.
- Bird wikiPageExternalLink www.ornithology.com.
- Bird wikiPageExternalLink birdidentifier.
- Bird wikiPageExternalLink completed_essays.html.
- Bird wikiPageExternalLink .U8ArB_ldWCl.
- Bird wikiPageID "3410".
- Bird wikiPageLength "171818".
- Bird wikiPageOutDegree "914".
- Bird wikiPageRevisionID "705520010".
- Bird wikiPageWikiLink 10th_edition_of_Systema_Naturae.
- Bird wikiPageWikiLink Accipitriformes.
- Bird wikiPageWikiLink Accipitrimorphae.
- Bird wikiPageWikiLink Actophilornis.
- Bird wikiPageWikiLink Adaptation.
- Bird wikiPageWikiLink Aequornithes.
- Bird wikiPageWikiLink Afroaves.
- Bird wikiPageWikiLink Agriculture.
- Bird wikiPageWikiLink Airfoil.
- Bird wikiPageWikiLink Alaska.
- Bird wikiPageWikiLink Albatross.
- Bird wikiPageWikiLink Albatross_(metaphor).
- Bird wikiPageWikiLink Altitudinal_migration.
- Bird wikiPageWikiLink Altricial.
- Bird wikiPageWikiLink Alula.
- Bird wikiPageWikiLink Ambush_predator.
- Bird wikiPageWikiLink American_flamingo.
- Bird wikiPageWikiLink Ammonia.
- Bird wikiPageWikiLink Amniote.
- Bird wikiPageWikiLink Anatidae.
- Bird wikiPageWikiLink Anatinae.
- Bird wikiPageWikiLink Anchiornis.
- Bird wikiPageWikiLink Ancient_Egypt.
- Bird wikiPageWikiLink Ancient_Rome.
- Bird wikiPageWikiLink Ancient_murrelet.
- Bird wikiPageWikiLink Animal_cognition.
- Bird wikiPageWikiLink Animal_communication.
- Bird wikiPageWikiLink Animal_lead_poisoning.
- Bird wikiPageWikiLink Animal_track.
- Bird wikiPageWikiLink Annas_hummingbird.
- Bird wikiPageWikiLink Anseriformes.
- Bird wikiPageWikiLink Anserinae.
- Bird wikiPageWikiLink Antarctica.
- Bird wikiPageWikiLink Antimicrobial.
- Bird wikiPageWikiLink Anting_(bird_activity).
- Bird wikiPageWikiLink Aorta.
- Bird wikiPageWikiLink Aortic_arches.
- Bird wikiPageWikiLink Apodiformes.
- Bird wikiPageWikiLink Aquatic_locomotion.
- Bird wikiPageWikiLink Arboreal_locomotion.
- Bird wikiPageWikiLink Archaeopteryx.
- Bird wikiPageWikiLink Archaeorhynchus.
- Bird wikiPageWikiLink Archosaur.
- Bird wikiPageWikiLink Asio.
- Bird wikiPageWikiLink Atlantic_puffin.
- Bird wikiPageWikiLink Atrium_(heart).
- Bird wikiPageWikiLink Augur.
- Bird wikiPageWikiLink Auk.
- Bird wikiPageWikiLink Auricle_(anatomy).
- Bird wikiPageWikiLink Aurornis.
- Bird wikiPageWikiLink Austinornis_lentus.
- Bird wikiPageWikiLink Austral_snipe.
- Bird wikiPageWikiLink Australaves.
- Bird wikiPageWikiLink Australian_brushturkey.
- Bird wikiPageWikiLink Australian_magpie.
- Bird wikiPageWikiLink Avebrevicauda.
- Bird wikiPageWikiLink Avemetatarsalia.
- Bird wikiPageWikiLink Avialae.
- Bird wikiPageWikiLink Avian_ecology_field_methods.
- Bird wikiPageWikiLink Avian_influenza.
- Bird wikiPageWikiLink Avian_range_expansion.
- Bird wikiPageWikiLink Aviculture.
- Bird wikiPageWikiLink Avifilopluma.
- Bird wikiPageWikiLink Avivore.
- Bird wikiPageWikiLink Bacteria.
- Bird wikiPageWikiLink Bar-tailed_godwit.
- Bird wikiPageWikiLink Bar-throated_minla.
- Bird wikiPageWikiLink Barn_swallow.
- Bird wikiPageWikiLink Basal_(phylogenetics).
- Bird wikiPageWikiLink Beak.
- Bird wikiPageWikiLink Bee_hummingbird.
- Bird wikiPageWikiLink Binocular_vision.
- Bird wikiPageWikiLink Biodiversity.
- Bird wikiPageWikiLink Biological_pest_control.
- Bird wikiPageWikiLink Biological_specificity.
- Bird wikiPageWikiLink Bird.
- Bird wikiPageWikiLink BirdLife_International.
- Bird wikiPageWikiLink Bird_anatomy.
- Bird wikiPageWikiLink Bird_colony.
- Bird wikiPageWikiLink Bird_conservation.