A member of India’s Dongria tribe faints in trance during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India, Sunday, February 22, 2015. Every year, members of this indigenous group celebrate this festival sacrificing animals and birds in worship of their deity. (Photo by Biswaranjan Rout/AP Photo)

In this Saturday, February 21, 2015 photo, members of India’s Dongria tribe watch their pictures in a visitor's camera during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India. (Photo by Biswaranjan Rout/AP Photo)

A member of India’s Dongria tribe wearing traditional anklets dances near their deity's worship venue during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India, Sunday, February 22, 2015. (Photo by Biswaranjan Rout/AP Photo)

In this Saturday, February 21, 2015 photo, a member of India’s Dongria tribe drinks water from a plastic bottle during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India. (Photo by Biswaranjan Rout/AP Photo)

Members of India's Dongria tribe carry drinking water on their heads during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India, Sunday, February 22, 2015. (Photo by Biswaranjan Rout/AP Photo)

In this Saturday, February 21, 2015 photo, a member of India’s Dongria tribe stands beside a tree during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India. (Photo by Biswaranjan Rout/AP Photo)

In this Saturday, February 21, 2015 photo, anklets of a child belonging to India’s Dongria tribe is seen during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India. (Photo by Biswaranjan Rout/AP Photo)

Members of India’s Dongria tribe offer grains to birds before they are sacrificed during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India, Sunday, February 22, 2015. (Photo by Biswaranjan Rout/AP Photo)

Members of India’s Dongria tribe sacrifice a goat during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India, Sunday, February 22, 2015. (Photo by Biswaranjan Rout/AP Photo)

In this Saturday, February 21, 2015 photo, a member of India’s Dongria tribe stands during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India. (Photo by Biswaranjan Rout/AP Photo)

A member of India's Dongria tribe holds a pigeon for sacrifice during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India, Sunday, February 22, 2015. (Photo by Biswaranjan Rout/AP Photo)

In this Saturday, February 21, 2015 photo, members of India’s Dongria tribe watch their traditional dance being performed by others during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India. (Photo by Biswaranjan Rout/AP Photo)

In this Saturday, February 21, 2015 photo, a woman belonging to India’s Dongria tribe carries her child during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India. (Photo by Biswaranjan Rout/AP Photo)

Members of India’s Dongria tribe prepare food during the two-day long Niyamraja Festival atop the Niyamgiri hills near Lanjigarh in Kalahandi district, Orissa state, India, Sunday, February 22, 2015. (Photo by Biswaranjan Rout/AP Photo)