 In the 1990s, some tigers were observed in the protected area, which had a Siberian tiger phenotype of a large head, pale pelage, white complexion, and wide stripes, and were therefore suspected to be Bengal-Siberian tiger hybrids.Billy Arjan Singh sent hair samples of tigers from the area to the Centre for Cellular and Molecular Biology in Hyderabad where the samples were analysed using mitochondrial sequence analysis.Results revealed that the tigers in question had a Bengal tiger mitochondrial haplotype indicating that their mother was a Bengal tiger.