Lemurs lick lollies to keep cool at wildlife park (From Banbury Cake)

I may be missing something here but surely our "sizzling" 28 degrees heat is far lower than what the Lemurs are used to in Madagascar? I don't recall when watching the 4 part series on Madagascar with David Attenborough which mentioned the hugely varied number of species of Lemur that they relied on Cornetto's to keep cool.

snert, you're quite correct that they don't live on Cornettos in the wild, but equally in the wild they don't find their food waiting for them in the same spot every morning so whatever you do won't precisely mimic the live environment.

Boredom can be a big problem for captive animals, so the keepers will do what they can to make life more interesting for the animals and one way is to make them work harder for their dinner: in this case they want the fruit but they have to get it out of the ice first. 'Ice lollies' are also fairly easy for the keepers to make (and they probably don't have nearly enough time to do this sort of thing except as an occasional treat).

On a visit to the Durrell Trust on Jersey a few years back I got the chance to help with a similar enrichment exercise for their aye-ayes: in that case we took kohlrabi, used a power drill to create lots of holes and in each hole put a maggot and then stoppered it up with cold porridge. That may not sound as appealing as 'ice lolly' does to us humans, but it really excited the aye-ayes as their normal diet consists in part of insects hooked out of deep crevices.