Best Wildlife Photos of the Week

Whitley awards for nature conservation 2018: A conservation biologist specializing in reptiles, Shahriar Caesar Rahman won the nature guardian award for his work to preserve Asia’s largest tortoise in a remote corner of Bangladesh. In 2011, Caesar began exploring the Chittagong Hills, one of the least explored but most bio-diverse areas on the planet. His team discovered the wild Asian giant tortoise, previously thought to be extinct, and a new species of forest turtle.
Photograph: Scott Trageser/2018 Whitley Award

A silverback gorilla in the Republic of Congo’s Nouabalé-Ndoki national park. Researchers now estimate that there are more than 360,000 western lowland gorillas in the wild, approximately one-third higher than earlier figures
Photograph: Zanne Labuschagne/WCS

An African penguin (right) interacts with a Cape Cormorant on Boulders Beach in Cape Town, South Africa.
Photograph: Nic Bothma/EPA