Photo taken on July 24, 2015, shows a white-bellied sea eagle resting on a buoy in the Marina Bay Reservoir in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on July 25, 2015, shows a lizard resting on the shore of the Marina Bay Reservoir in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on Jan. 11, 2015, shows an eagle catching a fish in the waters off the northern coast of Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on Jan. 10, 2015, shows a grey heron resting on a tree branch in Jurong Lake in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on May 13, 2015, shows a smooth-coated otter eating fish in the Marina Bay Reservoir in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on June 28, 2015, shows Singapore's Prime Minister Lee Hsien Loong (4th L, front) and former Australian Prime Minister Tony Abbott (2nd L, front) watching otters eating in a pond at Bishan Park in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on July 7, 2015, shows a troupe of long-tailed macaques looking for food in a residence near the MacRitchie Reservoir in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on Dec. 1, 2015, shows two smooth-coated otters wandering in the Gardens by the Bay in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on May 13, 2015, shows several smooth-coated otters wandering in the Gardens by the Bay in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on July 7, 2015, shows a long-tailed macaque looking for food in the MacRitchie Reservoir in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on May 10, 2015, shows several smooth-coated otters wandering in the monsoon drain near Bishan Park in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on March 24, 2015, shows an oriental pied hornbill sitting on the window pane in the city centre in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)

Photo taken on July 7, 2015, shows a long-tailed macaque looking for food in the MacRitchie Reservoir in Singapore. In Singapore, wild animals can still be found in the city centre or suburb in despite of its rapid economic development and urbanization since Singapore's independence in 1965. (Xinhua/Then Chih Wey)