{"id":843,"date":"2014-01-21T07:51:16","date_gmt":"2014-01-21T07:51:16","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=843"},"modified":"2026-03-19T10:38:47","modified_gmt":"2026-03-19T10:38:47","slug":"fakta-om-bjorner","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/nb\/facts-about-bears","title":{"rendered":"Fakta om bj\u00f8rner"},"content":{"rendered":"<p><strong>1. Mat:<\/strong>\u00a0Bj\u00f8rner spiser nesten hva som helst, og det er observert bj\u00f8rner som spiser gummist\u00f8vler, bilseter og maskinolje.<\/p>\n<p><strong>2. Svart hud:<\/strong>\u00a0Selv om <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-isbjorner\/\">isbj\u00f8rner<\/a>Pelsen er hvit, huden er svart for \u00e5 \u00f8ke absorpsjonen av solvarme.<\/p>\n<p><strong>3. L\u00f8ping:<\/strong>\u00a0De raskeste bj\u00f8rnene (svartbj\u00f8rner) kan l\u00f8pe i opptil 64 km\/t, noe som er nok til \u00e5 fange en <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-hester\/\">hest<\/a> i full galopp. Det raskeste n\u00e5levende mennesket er Usain Bolt, som til sammenligning kan l\u00f8pe i opptil 43 km\/t.<\/p>\n<p><strong>4. Aldersbestemmelse:<\/strong>\u00a0Den mest n\u00f8yaktige m\u00e5ten \u00e5 fastsl\u00e5 en bj\u00f8rns alder p\u00e5 er \u00e5 telle antall ringer under tannr\u00f8ttene ved hjelp av et mikroskop.<\/p>\n<p><strong>5. Den eldste bj\u00f8rnen:<\/strong>\u00a0Bj\u00f8rner kan bli opptil 30 \u00e5r gamle i naturen. Den eldste registrerte bj\u00f8rnen levde i fangenskap og ble 47 \u00e5r gammel!<\/p>\n<p><strong>6. Bj\u00f8rnefrie omr\u00e5der:<\/strong>\u00a0Det har aldri levd bj\u00f8rn i Australia eller Antarktis (Sydpolen). Selv om det ikke lever bj\u00f8rn i Afrika i dag, er det funnet fossiler av bj\u00f8rn der. Forskerne vet ikke hvorfor det ikke finnes bj\u00f8rn i Afrika i dag.<\/p>\n<p><strong>7. Vinterdvale:<\/strong>\u00a0En bj\u00f8rns normale hjertefrekvens er 40 slag i minuttet. Om vinteren g\u00e5r de fleste bj\u00f8rner i hi, som er en tilstand der bj\u00f8rnen sover og kroppen automatisk minimerer ressursforbruket. I dvale ligger hjertefrekvensen p\u00e5 8 slag i minuttet. Noen forskere bestrider imidlertid at bj\u00f8rner g\u00e5r i dvale fordi kroppstemperaturen ikke synker like mye som hos andre dyr i dvale. Derfor omtaler bj\u00f8rner noen ganger dvalen som \"vinterdvale\" i stedet for \"vinterdvale\".<\/p>\n<p><strong>8. Avf\u00f8ring = protein:<\/strong>\u00a0Under dvalen har bj\u00f8rnen heller ikke avf\u00f8ring, da den kan omdanne avf\u00f8ringen til protein - en prosess som vitenskapen enn\u00e5 ikke har forst\u00e5tt!<\/p>\n<p><strong>9. Amerikanske indianere:<\/strong>\u00a0Fordi bj\u00f8rner kan g\u00e5 korte avstander p\u00e5 bakbeina, kalte indianerne (i Nord-Amerika) dem \"dyrene som g\u00e5r som mennesker\".<\/p>\n<p><strong>10. Bamse:<\/strong>\u00a0Det amerikanske begrepet \"Teddy bear\" stammer fra den amerikanske presidenten Theodore (Teddy) Roosevelt, som nektet \u00e5 skyte en bj\u00f8rneunge under en jakttur. Hendelsen ble skildret i en tegnefilm, og kort tid etter tok leket\u00f8ysprodusentene i bruk begrepet.<\/p>\n<figure id=\"attachment_7800\" aria-describedby=\"caption-attachment-7800\" style=\"width: 790px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7800\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoerne-fakta-2.jpg\" alt=\"Fakta: Noen bj\u00f8rnearter kan komme opp i hastigheter p\u00e5 opptil 64 km\/t n\u00e5r de l\u00f8per.\" width=\"800\" height=\"535\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoerne-fakta-2.jpg 800w, https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoerne-fakta-2-300x201.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoerne-fakta-2-768x514.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoerne-fakta-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-7800\" class=\"wp-caption-text\">Tildeling: SteFou! - Flickr.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Bj\u00f8rner er ekstremt sterke dyr som kan l\u00f8pe opptil 64 km\/t, noe som er raskere enn en hest! Til sammenligning l\u00f8per det raskeste mennesket - Usain Bolt - i 43 km\/t.<\/strong><\/em><\/p>\n<h2>Arter og opprinnelse<\/h2>\n<ul>\n<li><strong>Slektninger:<\/strong>\u00a0Sel eller bladfotet sel (Pinnipedia) - som inkluderer elefantsel, sj\u00f8l\u00f8ve, hvalross og sel (slik vi kjenner dem) - er de n\u00e6rmeste n\u00e5levende slektningene til bj\u00f8rnen.<\/li>\n<li><strong>Arter:<\/strong>\u00a0Det finnes 8 n\u00e5levende bj\u00f8rnearter: bj\u00f8rnen <a href=\"https:\/\/www.123fakta.com\/nb\/fakta-om-pandabjorner\/\">Panda<\/a>Brillebj\u00f8rn, malayabj\u00f8rn, dovendyr, isbj\u00f8rn, kragebj\u00f8rn, amerikansk svartbj\u00f8rn og brunbj\u00f8rn. I tillegg finnes det noen f\u00e5 underarter, blant annet grizzlybj\u00f8rnen.<\/li>\n<li><strong>Truede arter:<\/strong>\u00a06 av 8 bj\u00f8rnearter er karakterisert som truede av\u00a0<a href=\"http:\/\/www.iucn.org\/\" rel=\"noopener noreferrer\">IUCN<\/a>\u00a0- de to artene som ikke regnes som utrydningstruet, er den amerikanske svartbj\u00f8rnen og brunbj\u00f8rnen.<\/li>\n<li><strong>St\u00f8rste art:<\/strong>\u00a0Den st\u00f8rste bj\u00f8rnearten som noen gang har eksistert p\u00e5 jorden, var kjempebj\u00f8rnen.\u00a0<em>Arctodus simus<\/em>som levde i Nord-Amerika og d\u00f8de ut for rundt 11 000 \u00e5r siden. Det st\u00f8rste eksemplaret som ble funnet, veide rundt 1 tonn og hadde en lengde p\u00e5 rundt 4 meter. Selv om det ikke er et faktum at kjempebj\u00f8rnen utelukkende levde av kj\u00f8tt, m\u00e5tte et dyr p\u00e5 denne st\u00f8rrelsen spise s\u00e5 mye som 16 kg kj\u00f8tt om dagen for \u00e5 holde seg i live...<\/li>\n<li><strong>Forfedre:<\/strong>\u00a0Bj\u00f8rner nedstammer fra sm\u00e5, insektetende pattedyr kalt \"miacider\" som levde for 62-33 millioner \u00e5r siden og dermed eksisterte p\u00e5 jorden i ca. 29 millioner \u00e5r. Den eldste kjente bj\u00f8rneslekten er slekten Ursavus, som var p\u00e5 st\u00f8rrelse med sm\u00e5 levende hunder og fantes p\u00e5 jorden frem til for rundt 29 millioner \u00e5r siden.<\/li>\n<\/ul>\n<figure id=\"attachment_7801\" aria-describedby=\"caption-attachment-7801\" style=\"width: 1190px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7801\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoernearter-2.jpg\" alt=\"Fakta: Det finnes 8 n\u00e5levende bj\u00f8rnearter\" width=\"1200\" height=\"676\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoernearter-2.jpg 1200w, https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoernearter-2-300x169.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoernearter-2-1024x577.jpg 1024w, https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoernearter-2-768x433.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/bjoernearter-2-18x10.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-7801\" class=\"wp-caption-text\">Kildeangivelse: Simm + Gu\u00e9rin Nicolas + Tambako The Jaguar + Snowmanradio + Jeff Kubina + Cburnett + HBarrison + Asiir - Wikipedia.org | Connormah + Magnus Manske - Flickr.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Her er de 8 n\u00e5levende bj\u00f8rneartene (fra venstre til h\u00f8yre): Brunbj\u00f8rn, kragebj\u00f8rn, malayabj\u00f8rn, isbj\u00f8rn, panda, brillebj\u00f8rn, brillebj\u00f8rn, amerikansk svartbj\u00f8rn og dovendyr.<\/strong><\/em><\/p>\n<h2>Fakta om de enkelte bj\u00f8rneartene<\/h2>\n<ul>\n<li><strong>Pandabj\u00f8rner:<\/strong>\u00a0Pandabj\u00f8rnen (Ailuropoda melanoleuca) har en ekstra \"tommel\" (som egentlig er et ekstra stort sesambein) som brukes til \u00e5 holde fast i bambus. En pandabj\u00f8rn kan spise opptil 45 kg bambus per dag.<\/li>\n<li><strong>Leppebj\u00f8rner:<\/strong>\u00a0Favorittmaten til dovendyret (Melursus ursinus) er termitter. Dovendyr har ingen tenner, noe som gj\u00f8r det enkelt for dem \u00e5 suge termitter og andre insekter ut av hiet sitt. De kan til og med lukke neseborene for \u00e5 skape et sterkere sug. Dovendyret er den eneste bj\u00f8rnearten som er mer aktiv om natten enn p\u00e5 dagtid.<\/li>\n<li><strong>Malaysiske bj\u00f8rner:<\/strong>\u00a0Malayabj\u00f8rnen (Helarctos malayanus) har de lengste kl\u00f8rne av alle bj\u00f8rner. Den har ogs\u00e5 den lengste tungen, som kan v\u00e6re opptil 25 cm lang!<\/li>\n<li><strong>Grizzlybj\u00f8rner:<\/strong>\u00a0Omtrent 98% av alle grizzlybj\u00f8rner (Ursus arctos horribilis) i USA lever i Alaska. I 2008 ble en mann angrepet av en grizzlybj\u00f8rn. Han overlevde angrepet ved \u00e5 spille d\u00f8d - selv da bj\u00f8rnen begynte \u00e5 gnage p\u00e5 hodebunnen hans! Til slutt mistet bj\u00f8rnen interessen og forsvant.<\/li>\n<li><strong>Koalabj\u00f8rner:<\/strong>\u00a0Koalabj\u00f8rnen (Phascolarctos cinereus) er - til tross for navnet - ikke i slekt med de ekte bj\u00f8rnene (Ursidae); den er et pungdyr (Marsupialia), i likhet med blant annet kenguruer og pungrever.<\/li>\n<\/ul>\n<h2>Mer fakta om bj\u00f8rner<\/h2>\n<ul>\n<li><strong>Altetende:<\/strong>\u00a0Alle bj\u00f8rner er omnivorer (dvs. altetende) og spiser derfor b\u00e5de kj\u00f8tt og planter.<\/li>\n<li><strong>Tannsett:<\/strong>\u00a0Bj\u00f8rner er de eneste store kj\u00f8tteterne som regelmessig spiser b\u00e5de kj\u00f8tt og planter. Derfor har de forskjellige tenner for \u00e5 kunne spise b\u00e5de kj\u00f8tt og planter.<\/li>\n<li><strong>Pels:<\/strong>\u00a0Alle bj\u00f8rner f\u00f8des uten pels - bortsett fra isbj\u00f8rner og pandabj\u00f8rner.<\/li>\n<li><strong>Pelsjakke:<\/strong>\u00a0Bj\u00f8rner har to lag pels; 1) et kort lag som holder bj\u00f8rnen varm og 2) et langt lag som holder vann borte fra huden og det korte pelslaget.<\/li>\n<li><strong>Verkt\u00f8y:<\/strong>\u00a0N\u00e5r bj\u00f8rner \"r\u00f8yter\", kan de ta en stein med potene og gni den mot huden, og bruke den som et verkt\u00f8y for \u00e5 fjerne pels som faller av.<\/li>\n<li><strong>Hjulben:<\/strong>\u00a0Bj\u00f8rner er hjulbeinte, noe som gir dem bedre grep og balanse.<\/li>\n<li><strong>Syn:<\/strong>\u00a0I motsetning til mange andre pattedyr har bj\u00f8rner fargesyn, og synet deres er generelt nesten like godt som menneskets.<\/li>\n<li><strong>H\u00f8ring:<\/strong>\u00a0Bj\u00f8rnens h\u00f8rsel er bare litt bedre enn menneskets<\/li>\n<li><strong>Luktesans:<\/strong>\u00a0Bj\u00f8rnens luktesans er rundt 100 ganger bedre enn menneskets. Isbj\u00f8rner kan for eksempel lukte byttedyr p\u00e5 32 kilometers avstand og kan ogs\u00e5 lukte en d\u00f8d sel under 90 cm is!<\/li>\n<li><strong>Gallebj\u00f8rner:<\/strong>\u00a0I asiatiske land brukes galle fra bj\u00f8rnens gallebl\u00e6re som medisin. Utvinning av galle er en stor kommersiell industri, der tusenvis av bj\u00f8rner holdes i fangenskap og fungerer som \"gallemaskiner\", som holdes i live kun for \u00e5 produsere galle (s\u00e5kalte \"gallebj\u00f8rner\").<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>1. Mat: Bj\u00f8rner spiser nesten hva som helst; det er observert bj\u00f8rner som spiser gummist\u00f8vler, bilseter og maskinolje. 2. Svart hud: Selv om isbj\u00f8rnens pels er hvit, er huden svart for \u00e5 \u00f8ke absorpsjonen av varme fra solen. 3. L\u00f8ping: De raskeste bj\u00f8rnene (svartbj\u00f8rner) kan l\u00f8pe i opptil 64 km\/t, noe som er nok til \u00e5 ... <a title=\"Fakta om bj\u00f8rner\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/nb\/facts-about-bears\" aria-label=\"Les mer om fakta om bj\u00f8rner\">Les mer<\/a><\/p>","protected":false},"author":1,"featured_media":7798,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[67,68],"tags":[120],"class_list":["post-843","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animals","category-terrestrial-animals","tag-adsense"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Facts about bears - Behavior, strength, age, etc.<\/title>\n<meta name=\"description\" content=\"Fact: Bears can run up to 64 km\/h, which is faster than a horse! 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