Karl Ammann / Ba'ka pygmy in Cameroon, West Africa being tested for Ebola virus after eating infected gorilla meat. Close genetic correlation between humans and apes means that many of the same viruses and parasite...

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) biologist, Rebecca Cliffe, and veterinarian, Yolanda Ruba, taking blood from anesthetized sloth, Aviarios Sloth Sanctuary, Costa Rica

Doug Gimesy / Boobok owl (Ninox boobook) chick held by veterinary nurse while blood is taken for analysis. Chick treated for head trauma, likely caused by bird attack. Currumbin Wildlife Hospital, Gold Coast, Queen...