These little guys are preparing for their breeding season. They build their nests side by side on these small ledges. Different to other sea birds, gannets build nests. They use algae as nesting material. Nowadays, they also use wasted parts of fish nets and other plastic materials. While algae decay over time, the artificial material fish nets and such consist of, don’t decay. Instead, it’s a huge danger for fish, dolphins, whales and for fish-catching birds. The material can’t be bitten through when the head, a foot or a wing gets entangled by the material. In that case the animal usually has to die.