The world's only giant panda triplets celebrate their fourth birthday at Chimelong Safari Park in Guangzhou, China. /VCG Photo

A lioness takes a swipe at Bhanu the Asiatic lion during an event to publicize World Lion Day at London Zoo in London, Britain. /VCG Photo

Toy, a 10-day-old female giraffe named after Israeli singer Netta Barzilai's song "Toy", winner of the 2018 Eurovision Song Contest, is seen with its mother Laila in their pen at Jerusalem's Biblical Zoo. /VCG Photo

A murmuration of migrating starlings is seen across the sky near the village of Beit Kama in southern Israel. /VCG Photo

A fox walks past 10 Downing Street in London, Britain. /VCG Photo

Penguins come ashore in Neko Harbour, Antarctica. /VCG Photo

Horses are seen inside a forest near the ruins of the Greek and Roman city in Shahhat, Libya. /VCG Photo

Bulgarian farmer Safet Ismail, 53, reacts next to storks that he saved in the village of Zaritsa, Bulgaria. /VCG Photo

Birds sit on the back of a zebra in the Nairobi National Park in Kenya. /VCG Photo

A female adult jaguar sits atop a tree at the Mamiraua Sustainable Development Reserve in Uarini, Amazonas state, Brazil. /VCG Photo

A warden watches over Najin (front) and her daughter Patu, the last two northern rhino females, at the Ol Pejeta Conservancy in Laikipia National Park, Kenya. /VCG Photo