The rapid expansion of urban areas into global biodiversity hotspots has exacerbated the conflict between urban development and biodiversity conservation. This tension poses a critical challenge for future conservation efforts in the "Urban Millennium." Urban rewilding has emerged as a promising strategy to reconcile this conflict by re-establishing the values and symbiotic relationships of biodiversity within urban spaces. Our project, "Urban Rewilding," focuses on addressing the needs of urban wildlife through ecological insights derived from Epping Forest's use of deadwood. By leveraging computational design and artificial intelligence, this project seeks to restore, protect, and enhance urban biodiversity and the food chain, thereby creating post-nature habitats that offer innovative perspectives on urban ecosystem rewilding.