What unusual characteristic is noted about the twig snake's delivery mechanism for its hemotoxic venom?

Answer

It requires the snake to bite and hold on for the venom to fully take effect.

The delivery mechanism of the twig snake's rear-facing fangs is unusual because it necessitates the snake to bite and hold on for the venom to fully take effect.

What unusual characteristic is noted about the twig snake's delivery mechanism for its hemotoxic venom?
animalLongevitysnake