Carnival actually dates back to the ancient Greek spring festival in honour of Dionysus, the god of wine. It was a massive binge – a celebration of excess, and later the church, unable to suppress it, wisely adapted it instead to its own traditions.

These are in fact caterpillar nests, constructed by the pine processionary caterpillar (chenille processionnaire) larva, who live in large ‘tents’ and march out at night in single file (hence the name) to feed on the pine needles.