Maybe because marvelling at a dingo sounds strange to an Australian-or maybe because you assume something about the European zoo population of NGSDs without taking a look at ZootierlisteHomepage
Firstly, you're looking down on it from a great height (something I hate, viewing in pits or similar). The hotwire is very obvious and obtrusive. And finally, I've been to New Guinea and what I can see there lloks more like the ground outside a hut in a village, than native NG habitat. The dog is lying in the sun presumably because there is no other form of heating.
I bit my tongue because I realise I can't see the entire enclosure - perhaps the rest of it is thickly vegetated, the hotwires are obscured, there are heatlamps, and plenty of enrichment.
NGSDs are pretty hardy when it comes to European weather, and require heat lamps or any other kind of heating only in the coldest of winters.
Taking a sunbath is usually just the very same kind of comfort behaviour in animals as it is in humans. It does not have to indicate that the animal in question is freezing. Judging from the pic, the dingo enjoyed lying in the sun just as any other dog...
Indeed, it was warm so this one was relaxing. And there's only 2 strands of hotwire, it's hardly obtrusive lol. No, it's not thickly vegetated, I think that might be a bamboo plant that's been destroyed in the background. They had a climbing platform that doubled as their house and the usual enrichment stuff, enclosure was nothing exciting though but it was adequate.