Despite needing 18-21 hours of sleep a day , koalas are still capable of startling displays of ene Despite needing 18-21 hours of sleep a day , koalas are still capable of startling displays of energy, agility and aggression--especially around mating season. Get a closer look at the surprisingly rich and unexpected hidden lives of these iconic Australian marsupials in their natural habitat真正的勇士,敢于直面惨淡的人生,敢于正视淋漓的鲜血。
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