In 2012, the Amsterdam city council adopted a municipal ecological structure and launched a programme aimed at solving 180 ecological bottlenecks. Part of this are some brigdes for squirrels between two habitats in the city of Amsterdam.

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Tussen Duin & Dijk
Tussen Duin & Dijk

G. Timmermans. (2018). The squirrel bridge and Amsterdam's municipal ecological structure. Tussen Duin & Dijk, 17(3b), 24–25.