Best Wildlife Photos of the Week

Great egret in flight, Venice, Florida, US.
Photograph: Alamy Stock Photo

Wildlife, including elephants and a giraffe, in the Mara Triangle, the north-western part of Masai Mara national reserve in southern Kenya.
Photograph: Yasuyoshi Chiba/AFP/Getty Images

Rangers fit a hi-tech GPS tracker to an elephant in Mwagna national park, in north-eastern Gabon, as part of a new programme to thwart poachers.
Photograph: STRINGER/AFP/Getty Images

Leading ivory trade researcher Esmond Bradley Martin, who was murdered at his home in Nairobi, Kenya this week. Martin pioneered efforts to combat elephant and rhino poaching.
Photograph: Courtesy of Save The elephant

An activist at the Centre for Orangutan Protection examines an x-ray of a male orangutan found dead with his body riddled with 130 airgun pellets and machete wounds in Bontang, East Kalimantan.
Photograph: Centre For Orangutan/AFP/Getty Images

Zoo keeper Zuzana Matyasova feeds and counts the penguins during the ZSL London Zoo annual stock take, England.
Photograph: Joe Maher/Getty Images