Leaellynasaura amicagraphica, the small polar dinosaur from the Early Cretaceous of Australia. At the time, the area was well within the Antarctic Circle.
Leaellynasaura was a small and gracile herbivore with a ridiculously long tail. Despite looking inpractical at best, the tail could have been quite a multi-purpose tool. It has been suggested to act as a scarf when the animal was resting in cold weather. I suspect it might have also been a sort of a signal post when kept unpright like this, keeping the group together. And if there was a dark marking somewhere around the tip of the tail, maybe it could have fooled predators to attack the tail instead of more vulnerable parts, allowing the animal to escape.
I don't know if there's a phrase for it in English, but in Finnish "blue moment" is the time a bit after sunset in winter, when everything turns blue. It only works in snowy conditions and in certain sort of weather, though.