Andy Rouse / Asian elephant (Elaphus maximus) bathing in river, drinking, captive, Pinnawala Elephant Orphanage, Sri Lanka

Ripan Biswas / Two Blue spotted mud skippers (Boleophthalmus boddarti) fighting at water's edge, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Brahminy kite (Haliastur indus) in flight, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Bengal tiger (Panthera tigris tigris) strolling among mangrove jungle, Sunderban tiger reserve, West Bengal, India. Endangered.

Ripan Biswas / Brown winged kingfisher (Pelargopsis amauroptera) perched on branch, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Collared kingfisher (Todiramphus chloris) perched on branch, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Yellow fiddler crab (Uca sp.) portrait, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Mangrove tree crab (Aratus pisonii) crawling over tree trunk in mangroves, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / West Bengal

Ripan Biswas / Mangrove horseshoe crabs (Carcinoscorpius rotundicauda) pair mating in mud at dawn, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Mangrove hermit crab (Clibanarius laevimanus) inside of the shell of a mollusc, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Mangrove forest, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Red fiddler crab (Minuca minax) female, portrait, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Red fiddler crab (Minuca minax) male, portrait, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Dwarf Indian mudskipper (Periophthalmus novemradiatus) resting on leaf on water surface, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Jungle cat (Felis chaus) standing among mangroves, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Jungle cat (Felis chaus) walking though mangroves, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Spotted deer (Axix axis) standing among dense mangrove forest, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Jungle cat (Felis chaus) female and cub resting in afternoon sunlight, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Marsh crocodile (Crocodylus palustris) leucistic, resting among mangroves, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Brahminy kite (Haliastur indus) perched on branch, calling, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Blue spotted mud skipper (Boleophthalmus boddarti) drinking at water's edge, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Bengal monitor lizard (Varanus bengalensis) swimming on water surface, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Red junglefowl (Gallus gallus) male, foraging on mangrove forest floor, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Spotted deer (Axix axis) walking through long grass, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / White throated kingfisher (Halcyon smyrnensis) perched on a reed, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Eurasian whimbrel (Numenius phaeopus) with crab prey in beak, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Small minivet (Pericrocotus cinnamomeus) perched on branch, stretching wings, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Peregrine falcon (Falco peregrinus) perched on branch, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Peregrine falcon (Falco peregrinus) perched on branch, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Pied kingfisher (Ceryle rudis) taking flight, Sunderban tiger reserve, West Bengal, India.

Ripan Biswas / Black capped kingfisher (Halcyon pileata) perched on branch spreading wings, Sunderban tiger reserve, West Bengal, India.