{"id":20597,"date":"2022-09-20T09:38:24","date_gmt":"2022-09-20T07:38:24","guid":{"rendered":"https:\/\/www.discoverwildlife.com\/?p=1930"},"modified":"2022-09-20T15:43:21","modified_gmt":"2022-09-20T13:43:21","slug":"why-do-rabbits-have-such-long-ears","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcwildlife\/rss_feed\/why-do-rabbits-have-such-long-ears\/","title":{"rendered":"Why do rabbits have such long ears?"},"content":{"rendered":"

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By Steve Harris\n \t\t<\/p>

Published: Tuesday, 20 September 2022 at 12:00 am<\/p>

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Rabbits are famed for their long ears, but why have they evolved to be so long? Steve Harris explains key reasons<\/p>\n

Why does a rabbit have such long ears?<\/h2>\n

A rabbit<\/a><\/strong>\u2019s ears serve two key functions. First \u2013 and obviously \u2013 they help the animal to monitor its environment and detect predators. Rabbits can pick up sounds over considerable distances, perhaps up to 3km. Their ears can be rotated\u00a0270 degrees to help detect\u00a0the source of a sound, and\u00a0can revolve independently\u00a0to monitor different noises.<\/p>\n

Second, they assist in thermoregulation. A rabbit\u2019s ears contain an extensive network of blood vessels that provide a large surface area for heat exchange. These vessels swell (vasodilation) when the rabbit is hot, and contract (vasoconstriction) when it is cool, so much so that they are barely visible in cold weather.<\/p>\n

\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>
A rabbit with great long ears! \u00a9 Dennis Heidrich\/EyeEm\/Getty<\/em><\/span><\/figcaption><\/div>\n

Rabbits are native to Spain and southern France, but have been introduced to many other parts of the world. Though they differ in size across the globe (those in Australia and Britain are 50 per cent larger than those in Spain), ear length is relative not to body proportions but to climate: in Britain they are 60\u201370mm long, in Spain about 75mm long, and in the arid parts of Australia roughly 80mm long, to help the animals cope with the hotter conditions.<\/p>\n