The environmental organization ‘Kallisto’ expressed deep sorrow over the passing of Yiannis Boutaris, acknowledging his impact on their shared vision for nature and wildlife conservation. In a heartfelt tribute, they reflected on their close collaboration and the emotional journey they shared. They noted that even after a painful separation in 2004, Boutaris continued to see them as family, emphasizing their common goal of fostering coexistence between humans and wildlife. Kallisto also extended condolences to Boutaris’s family and colleagues at the Arktouros organization.