Black faced Langur Semnopithecus entellus mating in Bandipur Tiger Reserve, India
The mating lasted for 5 seconds. It should be noted that the hind legs of the male are not on the ground when it mounted on the female. Initially the female had her head turned towards her right. After 2 seconds she turned her head to look back at her mate. The male then lowered his head and appeared to make an attempt to bite her neck momentarily. The female turns her head to look straight. The male looks up and shows his dentures.
Photographed with a Canon EOS 1D Mark II, Canon EF 400mm f2.8 L IS USM lens, ISO 200, f3.5, 1/800