Arboreal Forums - This is an older thread recently bumped with some very nice pictures of a puff adder hybrid and a scaleless puff adder.
Cobra Eats a Puff Adder
The Reptile Report - In the Kgalagadi Transfrontier National Park, photographer Piet Heymans came across the extraordinary sequence photographed below. The photo is taken near Langklaas in the park along a stretch of road where a puddle had formed from rains the night before. “It was amazing to see how the cobra puts its teeth forward each time, slowly forcing the puff adder down its throat. The tail of the puff adder disappeared in the cobra’s mouth 52 minutes later. The cobra sailed away as if it had swallowed nothing.”
See the full pic set after the jump!@ the online source