The logo for the Life4zoo project was created as a visual abbreviation for the principle of circular water use. The project focuses on re-purifying and returning water to circulation in the enclosures of the Liberec Zoo and the drought-prone Barcelona Zoo, thereby contributing to more sustainable water management and mitigating the impacts of climate change. The basic motif of the logo is a drop of water, blue color and the number 4, which is graphically connected to resemble circulation and a closed water cycle.