The article explores how cities can set goals to support biodiversity by analyzing ecosystem services. By focusing on habitat provision, the study shows that urban green spaces and forests play a crucial role. Setting ambitious targets for urban ecological performance is important to counter the negative impact cities have on ecosystems. A case study comparing Wellington, New Zealand, and Curitiba, Brazil, demonstrates how specific goals can improve conservation efforts in urban areas. Achieving these goals may be challenging, but tailored objectives can enhance ecosystem services from urban green spaces.