The earliest reference to this phenomenon was made by E.P. Gee, a British tea planter in his book "Wild Life of India" in 1957.
The Zoological Survey of India had sent a team to visit the place in 1977. Later, leading ornithologists from Europe, the US and Japan too studied the mystery.
However, no case of migratory birds plunging to their deaths has been recorded yet.
Some bird specialists attribute the phenomenon to the electro-magnetic forces of Jatinga, which is surrounded by geographical faultlines all round. But no conclusive evidence has emerged till now.