In India's Kaziranga National Park, tigers can grow fat feasting on hog deer, water buffalo and elephants. The park has the world's highest density of tigers, according to camera trap surveys conducted from 2009 to 2011 by Aaranyak, a non-profit wildlife conservation society in India.
Kaziranga is in India's northeastern Assam state, where tall grasslands and forest meet the foothills of the Himalayas. Though the park has a high density of tigers, the animals face pressures from poachers, said Firoz Ahmed, a conservation biologist with Aaranyak.
Aaranyak tracks tigers and wildlife in Kaziranga and other national parks and preserves throughout India to monitor the endangered species, which survive in about six percent of their historic range, Ahmed said. The group partners with Panthera, the World Wildlife Fund and other conservation societies.
The remote cameras also capture more than tigers. Rarely-seen animals such as the spotted linsang and the clouded leopard appeared in a camera trap survey Aaranyak conducted in Namdapha National Park in 2012. The park is east of Kaziranga, in the state of Arunachal Pradesh near India's border with Myanmar.
One of two tigers identified during a 2012 survey of Namdapha National Park in India. Aaranyak, a conservation group in India, tracked the second tiger through DNA analysis of its poop.
The Asiatic golden cat is one of many elusive animals caught on camera traps during a tiger survey in Namdapha National Park in northeastern India. The cats stand 22 inches (56 centimeters) tall at the shoulder and live throughout southeast Asia.
A rare picture of the spotted linsang from a 2012 tiger survey in Namdapha National Park in India. The small carnivore lives in trees and weighs only 2 pounds (1 kilogram).
The clouded leopard is another reclusive cat humans rarely see in the wild, though camera traps are spotting the sleek animals more and more. Relative to body size, clouded leopards' long canines are the largest of all living cats, according to the Smithsonian National Zoological Park.
A tiger in India's Kazaringa National Park carries a hog deer. The small deer are like chicken for a tiger, providing about 65 pounds (30 kilograms) of meat, said conservation biologist Firoz Ahmed.
A female tiger with two cubs. The third tiger may be the cub's father, said conservation biologist Firoz Ahmed. Female tigers mate with several males to prevent infanticide after they bear litters, he said.
A heavily pregnant tiger passes in front of a camera trap in Kaziranga National Park in India.
A large male tiger snapped by a camera trap in Kaziranga National Park in India. Male Bengal tigers can weigh more than 500 pounds (220 kilograms). The park has a high density of prey animals and dead biomass, such as elephants, rhinos and buffalo who died of natural causes, for tigers to feast on.
Female tigers, such as the Kaziranga National Park resident seen here, are on average smaller in size than male tigers.
Researchers with the conservation group Aaranyak must constantly move their camera traps, as tigers quickly learn to avoid the flashing boxes, said conservation biologist Firoz Ahmed.
Researchers with Aaranyak, a conservation group in India, identify tigers by comparing their stripes. There are approximately 100 tigers in Kaziranga National Park, where these two tigers roam.
Photos show an elephant destroying one of Aaranyak's remote cameras, which cost $1,000 and are imported from the United States. The cameras are typically mounted as pairs to snap each side of a passing tiger. Elephants don't like the flash, and do their best to destroy the camera traps, said conservation biologist Firoz Ahmed, who dubbed the animal "kung-fu elephant" for its front and back kicks.
Illegal logging inside a tiger preserve in India. The endangered animals face increasing population pressure from people who wish to clear forest land for logging and farming, said biologist Firoz Ahmed of the conservation group Aaranyak.
A water buffalo stops for a drink in front of a camera trap in Kaziranga National Park in northeastern India's Assam state.
Kaziranga National Park, in northeastern India, is a conservation success story for the Asian one-horned rhinoceros. More than 2,000 rhinos live in the park, of the approximately 3,000 worldwide. Only a few dozen were left in the wild in the early 20th century.
A tiger looks at a flashing camera trap in Kaziranga National Park in India.
A tiger rests in water in this well-known photo by conservation biologist Firoz Ahmed. Ahmed works for the non-profit wildlife conservation group Aaranyak, which tracks and monitors tigers throughout India.