This comes from the book Mysterious Creatures A Guide To Cryptozoology...
Minton and Minton (1969) report that natives
of northern India tell chilling stories of the
BIS-COBRA, whose name indicates it has the
killing power of 20 cobras. The culprit turns
out to be the harmless gecko Eublepharis hardwickii.
In Pakistan, natives call the related
gecko Eublepharis macularius the Hun-khun,
and hold it to be “the deadliest creature . . .
more dangerous than the Cobra.”(Minton
and Minton, 1969; Goodman and Hobbs,
1994; personal observation).
View attachment 11921
Head of the harmless gecko Eublepharis hardwickii, mistaken for the venomous BIS-COBRA in northern India. (Drawing
[pencil on paper] by Jack Rabbit, c 1995)