Mark Witton was right, there are not enough stegosaurs out there [link]
These animals need more attention and my All Yesterdays series wouldn't complete without one of these spiky guys. In addintion I want to speculate about temporal activity. Everyone should have seen nocturnal theropods already but ornithishians are- beside Leaellynasaura which is often depicted during the antarctic winter- very rare cases. But even today there are many herbivores/insectivores which become active during the night; for example pangolins or porcupines, but also bigger animals like White-tailed-deers, Spectacled bear and some kangaroos can be watched mostly in the dark.
The animal you see here is a Chungkingosaurus, one of the smallest and most primitive members of the group. Because of the close relationship to Huayangosaurus the stegosaur is shown here with shoulder spikes (and some stage-one-feathers) and some bigger scales at the flanks. I imagine that this animals rest during the day deep in the forests and come out when the night dawns to search food.