We’re Foundation HouseSparrow Sanctuary, a non-profit field organization that consists of volunteers, that protects the HouseSparrow, an endangered species in the Netherlands that sets up a nationwide network of HouseSparrowhabitats. We increase bio-diversity, provide acute emergency aid, maintain well-being, conduct research and influence society, municipality and politics. We show how they should live under the care of people in accordance with their natural nature even in the busiest cities.