After the harvest there are only the bare stalks left and then the crows arrive to see what is left for them to have a nibble.
Some has already been harvested, but the maize is still waiting.
Most of the sugar in Switzerland is from sugar beets. The harvest takes place in Autumn and the farmers leave them in piles on the edge of the fields. They are then picked up by the trucks belonging to the processing plants where the sugar is produced.