Urban hedgehogs require access to multiple gardens to find sufficient food, mates and nesting sites. Creating connected garden networks is the most effective large-scale welfare intervention available.
Individual hedgehog welfare in urban areas depends on garden network connectivity. A single garden, however well-provisioned with food and nesting habitat, cannot meet a hedgehog's territorial requirements. Isolated individuals in food-poor, disconnected gardens must attempt road crossings to find additional foraging areas - increasing road mortality risk. Neighbourhood-scale connectivity through coordinated boundary holes creates the habitat network that allows hedgehogs to meet their needs without dangerous road exposure. Community action is more effective than individual garden improvement alone.