I hadn't heard of Nocturnal Preserves before, but what a good idea! Why – and how – to rewild the night:

“In the case of nocturnal preserves,” says Bob King, national chair of the RASC light abatement committee, “we allow brighter skies, and we don’t require it be a site for astronomy but that it must really focus on preserving the nocturnal environment for the animals and birds that frequent the area.”