Lowland streaked tenrec, Andasibe, Madagascar
Found at the start of a lengthy night hike in an Andasibe camp site. Allegedly they are rare to see in winter. This species is very easy to recognize from its yellow streaks. There's a lot of interesting morphological facts regarding this species, but most are rather complex and technical. Therefore, I'll limit it to the most spectacular fact: this is the only mammal species known in the world that uses Stridulation for generating sounds.
Stridulation is the production of sound by moving body parts together, common in insects and in some birds, yet this is the only mammal to do it. Specifically, this species rubs it spines together to produce a sound when threatened.
This species is also known for always having at least one obstructing element in front of its face, example from 4 years earlier: