The houses of Burano (such as those of Murano and Chioggia) are famous for their bright colors, which represent a "greedy" photographic subject for thousands of tourists. The reason is that in the lagoon there is very often a thick fog and the colored houses are used by fishermen to recognize their village and even their home.
Even if it doesn't seem like it, this is not an aggressive attitude: he was simply yawning ...
In fact, when the Vipers cannot escape and are seriously threatening, they curl up "blowing" and are ready to spring forward.