The birds of the Seine in Paris: an astonishing biodiversity. The Île de France concentrates 20% of the population of France on 2% of its territory.

Apart from the most common species, biodiversity is concentrated in parks, cemeteries and adjacent woods. In 2008, a pair of kingfishers nested near the Eiffel Tower. In 2020, herons entered from from the Courne de Courne following the destruction of the Buttes-Chaumont park.