Bird Island, Artificial island near Walvis Bay, Namibia.

Bird Island is a wooden platform built over the ocean near Walvis Bay, in Namibia, designed to provide nesting space for seabirds. It sits several meters above the water and is located far enough from the shore to offer undisturbed conditions for breeding birds.

A German settler began constructing the platform in 1930, starting small and gradually expanding it over the following years. The idea came from watching birds gather naturally on a nearby rocky formation, which suggested that a man-made structure could serve the same purpose.

The German name Guanoinsel and the mocking nickname Winter's Folly recall Adolf Winter, the carpenter from Swakopmund who built the platform. Guano is harvested once a year, in February and March, when the layer is about five centimetres thick. The platform also gives up to 200 pairs of great white pelicans a safe place to breed.

The platform cannot be reached from the shore and a boat is generally needed to get close to it. Visiting during the nesting season gives the best chance to see the birds in large numbers, though keeping a respectful distance is important to avoid disturbing them.

The guano produced by the birds on the platform was the original motivation behind its construction, not conservation. The accumulated droppings are periodically harvested and used as fertilizer, making the platform both a bird habitat and a small working operation.