BNPS.co.uk (01202 558833)<br />
Pic: Dave&amp;TinaTownend/BNPS.<br />
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At first glance it must have looked like the perfect spot for a heron to do some fishing on a lake at Longleat Safari &amp; Adventure Park.<br />
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Indeed the &lsquo;rocks&rsquo; looked so appealing the heron was soon sharing its prime waterside location with a pair of ducks.<br />
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None of the birds seemed overly-concerned to discover the rocks in question were actually the massive backs of the Wiltshire wildlife attraction&rsquo;s most dangerous residents &ndash; a pair of moody hippos called Spot and Sonia.<br />
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At close to 3.5 metres in length and weighing in at around 1.5 tonnes each, it&rsquo;s easy to see how the ducks could have mistaken Spot and Sonia&rsquo;s backs as a handy haul out.