The March 2019 cover image shows an ailing chimpanzee (Pan troglodytes schweinfurthii) monitored by Gombe Ecosystem Health researchers in Gombe National Park in the months before his death. Here we also see a female chimpanzee monitored by the Gombe Ecosystem Health Research team demonstrating signs of respiratory illness characterized by rhinorrhea. Photos by Kara Walker and Christopher Walker.

The corresponding article, Optimizing syndromic health surveillance in free ranging great apes: The case of Gombe National Park by Wolf et al. is issue 56:3’s Editor’s Choice article. Learn more about the research here.