In The Small Sparrow Hero, Yun-Hung poignantly highlights the potential for humanity to coexist with or cause catastrophe to ecosystems and species. This story is one of education for all involved. The Small Sparrow Hero, Ruei-Ruei, learns about the damage caused by unchecked development and the power of even the smallest voice. His human friend, Xiao-Yu, learns how to advocate for those without a public voice and the importance of putting the Sustainable Development Goals into practice. And both the bird and human communities learn the importance of working together for the common good. This is truly an inspiration for readers of all ages.