Scaled white-bellied pangolin Inside the Pangolin Sanctuary, a nonprofit organization in St. Augustine, Florida, USA, a baby pangolin is riding her mother's "hitchhiker." This mammal is illegally hunted for its flesh and scales. According to legend, pangolin scales have medicinal properties. Photograph: Joel Saltore
Pinnacles of the ear foxEs, the world's smallest foxes are common in the Sahara, and they have large ears that they use to dissipate heat when crossing deserts. Due to their cute looks, they are popular in the wild pet market. St. Louis Zoo Photo by Joel Saltore
Nearly half of the primate species of the red-collared lemur are at risk of extinction, and five here are among the most endangered species. It is estimated that there are only about 70 white-headed langurs left worldwide, and the number of red-collared lemurs has also declined significantly. Miller Zoo, USA Photo by Joel Saltore
Sumatran orangutan A Sumatian orangutan rests comfortably on a branch at the Kansas Hills Zoo, USA Photo: Joel Saltore
White-headed langur Rescue Center for Endangered Primates in Vietnam Photo: Joel Saltore
Asian tapir The baby tapir in the photo was just six days old at the time of shooting. Young Asian tapirs have stripes on their fur to hide in the dappled light and shadow of tropical forests. Minnesota Zoo, USA Photo by Joel Saltore
Brown-headed spider monkey Panama Summit Municipal Park Photo: Joel Saltore
Delacul U Langur A Delacur Langur enjoys a delicious banana At the Vietnam Endangered Primate Rescue Center Photo: Joel Saltore
Brazilian Tree Porcupine This species, which is largely nocturnal, is also called capuchin porcupines and spends 85% of its time in trees. Saltore photographed it resting but still alert. St. Louis Zoo, USA Photo by Joel Saltore
Snow Owl The snow owl lives at high altitudes in North America, Europe and Asia, but this one is shown in the photo in Nebraska. By the time Raptor Rescue rescued him, it was on the verge of starvation. Bird of Prey Rescue Of Nebraska, USA Photo: Joel Saltore