One of the star attractions of the Highland Wildlife Park has been weighed by keepers so they can keep an eye on his progress.
Walker the polar bear has nearly doubled in size since he arrived at the Highland park in December 2010.
The bear weighed 39 stone (248kg) when he arrived and now, at three years old, has weighed in at just over 63 stone (403kg).
Walker was put on the scales to help staff keep a record of his progression as he grows up.
Una Richardson, head keeper responsible for Walker, said: "The weigh in this morning with Walker went extremely well. We managed to tempt him onto the scales with a few of his favourites, sardines.
"We are really pleased with Walker’s weight, he’s a big boy at 401kg which is around 63 stone. It’s slightly higher than what we had expected, we guessed he could be around 62 stone, which is around 395 kg.
"He is three years old now and he has grown considerably since he first arrived. Knowing precisely what he weighs gives us a very good indication of how well he is doing, and should we need to anaesthetise him for any reason, or give him any medication, knowing what he weighs allows us to give him a more accurate and therefore a more effective dose."
It is thought the bear could reach up to 110 stone (700kg) when he is fully grown at the age of six years.
Weighing Walker was a two-person job, aided by a handful of sardines to get him onto the scales.
Staff at the park hope to find a mate for Walker sometime this year.
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