The carcass of a Royal Bengal Tiger was recovered from compartment number 7 of Madanpur forest range under Valmiki Tiger Reserve on Monday morning.
The animal was found lying on the bank of the Sikatia rivulet that flows through the forest.
Forest officials claim the tigerís carcass was found during routine patrolling on Sunday night.
Forest officials immediately moved the tigerís carcass to Bettiah for autopsy.
The death of the tiger has raised many a question for the tiger reserveís management. It is still to be established whether the tiger died a natural death though the post-mortem seems to indicate so.
At present, the number of Royal Bengal Tigers at the Valmiki Tiger Reserve is around 22.
According to the tiger reserveís director-cum-conservator of forests Santosh Tewari, the age of the tiger that was found dead was around 17-18 years.
The post-mortem report suggests it died because of multiple-organ failure.
The post-mortem had to be conducted in view of departmental provisions, he said.
The possible reason behind multi-organ failure could be old age as the tiger had lived most years of its life. The maximum age of a tiger varies from 20 to 22 years, the tiger reserveís director told The Telegraph.
Chief wildlife warden Bashir Ahmad Khan denied the possibility of any other reason behind the tigerís death.
Khan told The Telegraph: ďPrima facie, the cause behind the Royal Bengal Tigerís death seemed to be natural causes. In spite of that, we have preserved its viscera and are sending the same for further necessary tests in order to be sure regarding the actual reasons that led to the sudden death of the tiger.Ē