{"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-bjorne","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/da\/facts-about-bears","title":{"rendered":"Fakta om bj\u00f8rne"},"content":{"rendered":"<p><strong>1. Mad:<\/strong>\u00a0Bj\u00f8rne spiser n\u00e6sten alt; man har set bj\u00f8rne spise gummist\u00f8vler, bils\u00e6der og maskinolie.<\/p>\n<p><strong>2. Sort hud:<\/strong>\u00a0Selvom <a href=\"https:\/\/www.123fakta.com\/da\/fakta-om-isbjorne\/\">isbj\u00f8rne<\/a>Deres pels er hvid, og deres hud er sort for at \u00f8ge deres absorption af solens varme.<\/p>\n<p><strong>3. L\u00f8b:<\/strong>\u00a0De hurtigste bj\u00f8rne (sortbj\u00f8rne) kan l\u00f8be op til 64 km\/t, hvilket er nok til at fange en <a href=\"https:\/\/www.123fakta.com\/da\/fakta-om-heste\/\">hest<\/a> i fuld galop. Det hurtigste nulevende menneske er Usain Bolt, som til sammenligning kan l\u00f8be op til 43 km\/t.<\/p>\n<p><strong>4. Bestemmelse af alder:<\/strong>\u00a0Den mest pr\u00e6cise m\u00e5de at bestemme en bj\u00f8rns alder p\u00e5 er at t\u00e6lle antallet af ringe under dens tandr\u00f8dder ved hj\u00e6lp af et mikroskop.<\/p>\n<p><strong>5. \u00c6ldste bj\u00f8rn:<\/strong>\u00a0Bj\u00f8rne lever op til 30 \u00e5r i naturen. Den \u00e6ldste bj\u00f8rn, der er registreret, levede i fangenskab og blev 47 \u00e5r gammel!<\/p>\n<p><strong>6. Bj\u00f8rnefri omr\u00e5der:<\/strong>\u00a0Ingen bj\u00f8rne har nogensinde levet i Australien eller Antarktis (Sydpolen). Selvom der ikke lever bj\u00f8rne i Afrika i dag, har man fundet fossiler af bj\u00f8rne der. Forskerne ved ikke, hvorfor der ikke er bj\u00f8rne 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\u00f8rne i dvale, hvilket er en tilstand, hvor bj\u00f8rnen sover, og dens krop automatisk minimerer sit ressourceforbrug. Under dvalen er pulsen 8 slag i minuttet. Nogle forskere bestrider dog, at bj\u00f8rne g\u00e5r i hi, fordi deres kropstemperatur ikke falder s\u00e5 meget som hos andre dyr i dvale. Derfor refererer bj\u00f8rne nogle gange til vinterdvale som \"dvale\" i stedet.<\/p>\n<p><strong>8. Aff\u00f8ring = protein:<\/strong>\u00a0Under dvalen har bj\u00f8rne heller ikke aff\u00f8ring, da de kan omdanne deres aff\u00f8ring til protein - en proces, som videnskaben endnu ikke har forst\u00e5et!<\/p>\n<p><strong>9. Indf\u00f8dte amerikanere:<\/strong>\u00a0Fordi bj\u00f8rne kan g\u00e5 korte afstande p\u00e5 deres bagben, kaldte indianerne (i Nordamerika) dem for \"dyrene, der g\u00e5r som mennesker\".<\/p>\n<p><strong>10. Bamse:<\/strong>\u00a0Det amerikanske udtryk \"Teddy bear\" stammer fra den amerikanske pr\u00e6sident Theodore (Teddy) Roosevelt, som n\u00e6gtede at skyde en bj\u00f8rneunge under en jagttur. H\u00e6ndelsen blev skildret i en tegneserie, og kort tid efter tog leget\u00f8jsfabrikanterne udtrykket til sig.<\/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: Nogle bj\u00f8rnearter kan n\u00e5 hastigheder p\u00e5 op til 64 km\/t, mens de l\u00f8ber.\" 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\">Tilskrivning: SteFou! - Flickr.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Bj\u00f8rne er ekstremt st\u00e6rke dyr, der kan l\u00f8be op til 64 km\/t, hvilket er hurtigere end en hest! Til sammenligning kan det hurtigste menneske - Usain Bolt - l\u00f8be 43 km\/t.<\/strong><\/em><\/p>\n<h2>Arter og oprindelse<\/h2>\n<ul>\n<li><strong>Sl\u00e6gtninge:<\/strong>\u00a0S\u00e6ler eller bladfodss\u00e6ler (Pinnipedia) - som omfatter elefants\u00e6ler, s\u00f8l\u00f8ver, hvalrosser og s\u00e6ler (som vi kender dem) - er de n\u00e6rmeste nulevende sl\u00e6gtninge til bj\u00f8rne.<\/li>\n<li><strong>Arter:<\/strong>\u00a0Der findes 8 nulevende bj\u00f8rnearter: den <a href=\"https:\/\/www.123fakta.com\/da\/fakta-om-pandabjorne\/\">Panda<\/a>Brillebj\u00f8rn, malayabj\u00f8rn, dovendyr, isbj\u00f8rn, kravebj\u00f8rn, amerikansk sortbj\u00f8rn og brunbj\u00f8rn. Derudover er der et par underarter, der inkluderer grizzlybj\u00f8rnen<\/li>\n<li><strong>Truede arter:<\/strong>\u00a06 ud af 8 bj\u00f8rnearter er karakteriseret som truede af\u00a0<a href=\"http:\/\/www.iucn.org\/\" rel=\"noopener noreferrer\">IUCN<\/a>\u00a0- De to arter, der ikke betragtes som truede, er den amerikanske sortbj\u00f8rn og den brune bj\u00f8rn.<\/li>\n<li><strong>St\u00f8rste art:<\/strong>\u00a0Den st\u00f8rste bj\u00f8rneart, der nogensinde har eksisteret p\u00e5 Jorden, var k\u00e6mpebj\u00f8rnen.\u00a0<em>Arctodus simus<\/em>som levede i Nordamerika og udd\u00f8de for omkring 11.000 \u00e5r siden. Det st\u00f8rste eksemplar, der blev fundet, vejede omkring 1 ton og havde en l\u00e6ngde p\u00e5 omkring 4 meter. Det er ikke en kendsgerning, at k\u00e6mpebj\u00f8rnen udelukkende levede af k\u00f8d, men et dyr af dens st\u00f8rrelse skulle indtage op til 16 kg k\u00f8d om dagen for at holde sig i live...<\/li>\n<li><strong>Forf\u00e6dre:<\/strong>\u00a0Bj\u00f8rne nedstammer fra sm\u00e5, insekt\u00e6dende pattedyr kaldet 'miacider', der levede for 62-33 millioner \u00e5r siden og dermed eksisterede p\u00e5 Jorden i omkring 29 millioner \u00e5r. Den \u00e6ldste kendte bj\u00f8rnesl\u00e6gt er sl\u00e6gten Ursavus, som var p\u00e5 st\u00f8rrelse med sm\u00e5 levende hunde og levede p\u00e5 Jorden indtil for ca. 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: Der findes 8 nulevende 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\">Navngivning: 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 nulevende bj\u00f8rnearter (fra venstre mod h\u00f8jre): Brunbj\u00f8rn, kravebj\u00f8rn, malayabj\u00f8rn, isbj\u00f8rn, panda, brillebj\u00f8rn, brillebj\u00f8rn, amerikansk sortbj\u00f8rn og dovendyr.<\/strong><\/em><\/p>\n<h2>Fakta om de enkelte bj\u00f8rnearter<\/h2>\n<ul>\n<li><strong>Pandabj\u00f8rne:<\/strong>\u00a0Pandabj\u00f8rne (Ailuropoda melanoleuca) har en ekstra \"tommelfinger\" (som faktisk er en ekstra stor sesamknogle), der bruges til at holde fast i bambus. En pandabj\u00f8rn kan spise op til 45 kg bambus om dagen.<\/li>\n<li><strong>L\u00e6bebamser:<\/strong>\u00a0Dovendyrets (Melursus ursinus) foretrukne f\u00f8de er termitter. Dovendyr har ingen t\u00e6nder, hvilket g\u00f8r det nemt for dem at suge termitter og andre insekter ud af deres huler. De kan endda lukke deres n\u00e6sebor for at skabe et st\u00e6rkere sug. Dovendyret er den eneste bj\u00f8rneart, der er mere aktiv om natten end om dagen.<\/li>\n<li><strong>Malajiske bj\u00f8rne:<\/strong>\u00a0Malayabj\u00f8rnen (Helarctos malayanus) har de l\u00e6ngste kl\u00f8er af alle bj\u00f8rne. Den har ogs\u00e5 den l\u00e6ngste tunge, som kan v\u00e6re op til 25 cm lang!<\/li>\n<li><strong>Grizzlybj\u00f8rne:<\/strong>\u00a0Omkring 98% af alle grizzlybj\u00f8rne (Ursus arctos horribilis) i USA lever i Alaska. I 2008 blev en mand angrebet af en grizzlybj\u00f8rn. Han overlevede angrebet ved at spille d\u00f8d - selv da bj\u00f8rnen begyndte at gnave i hans hovedbund! Til sidst mistede bj\u00f8rnen interessen og forsvandt.<\/li>\n<li><strong>Koalabj\u00f8rne:<\/strong>\u00a0Koalabj\u00f8rnen (Phascolarctos cinereus) er - trods sit navn - ikke i familie med de rigtige bj\u00f8rne (Ursidae); den er et pungdyr (Marsupialia), ligesom k\u00e6nguruer, pungr\u00e6ve og andre.<\/li>\n<\/ul>\n<h2>Flere fakta om bj\u00f8rne<\/h2>\n<ul>\n<li><strong>Alt\u00e6dende:<\/strong>\u00a0Alle bj\u00f8rne er omnivorer (dvs. alt\u00e6dende) og spiser derfor b\u00e5de k\u00f8d og planter.<\/li>\n<li><strong>Tands\u00e6t:<\/strong>\u00a0Bj\u00f8rne er de eneste store k\u00f8d\u00e6dere, der regelm\u00e6ssigt spiser b\u00e5de k\u00f8d og planter. Derfor har de forskellige t\u00e6nder til specifikt at spise k\u00f8d og planter.<\/li>\n<li><strong>Pels:<\/strong>\u00a0Alle bj\u00f8rne f\u00f8des uden pels - undtagen isbj\u00f8rne og pandabj\u00f8rne<\/li>\n<li><strong>Pelsfrakke:<\/strong>\u00a0Bj\u00f8rne har to lag pels: 1) et kort lag, der holder bj\u00f8rnen varm, og 2) et langt lag, der holder vand v\u00e6k fra huden og det korte pelslag.<\/li>\n<li><strong>V\u00e6rkt\u00f8jer:<\/strong>\u00a0N\u00e5r bj\u00f8rne \"f\u00e6lder\", kan de tage en sten med poterne og gnide den mod huden og bruge den som et redskab til at fjerne den pels, der falder af.<\/li>\n<li><strong>Hjulben:<\/strong>\u00a0Bj\u00f8rne er hjulbenede, hvilket giver dem et bedre greb og balance.<\/li>\n<li><strong>Syn:<\/strong>\u00a0I mods\u00e6tning til mange andre pattedyr har bj\u00f8rne farvesyn, og deres syn er generelt n\u00e6sten lige s\u00e5 godt som menneskets.<\/li>\n<li><strong>H\u00f8relse:<\/strong>\u00a0Bj\u00f8rnens h\u00f8relse er kun lidt bedre end menneskets<\/li>\n<li><strong>Lugtesans:<\/strong>\u00a0En bj\u00f8rns lugtesans er omkring 100 gange bedre end menneskets. For eksempel kan isbj\u00f8rne lugte bytte p\u00e5 32 km afstand og kan ogs\u00e5 lugte en d\u00f8d s\u00e6l under 90 cm is!<\/li>\n<li><strong>Gallebj\u00f8rne:<\/strong>\u00a0I asiatiske lande bruges galde fra bj\u00f8rnes galdebl\u00e6rer medicinsk. Udvindingen af galde er en stor kommerciel industri, hvor tusindvis af bj\u00f8rne holdes i fangenskab og fungerer som \"galdemaskiner\", der holdes i live med det ene form\u00e5l at producere galde (s\u00e5kaldte \"galdebj\u00f8rne\").<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>1. F\u00f8de: Bj\u00f8rne spiser n\u00e6sten alt; man har set bj\u00f8rne spise gummist\u00f8vler, bils\u00e6der og maskinolie. 2. Sort hud: Selv om isbj\u00f8rnens pels er hvid, er deres hud sort for at \u00f8ge deres absorption af varme fra solen 3. L\u00f8ber: De hurtigste bj\u00f8rne (sorte bj\u00f8rne) kan l\u00f8be op til 64 km\/t, hvilket er nok til at ... <a title=\"Fakta om bj\u00f8rne\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/da\/facts-about-bears\" aria-label=\"L\u00e6s mere om fakta om bj\u00f8rne\">L\u00e6s Mere<\/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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