When a pit viper's mouth is closed, what happens to its solenoglyphous fangs?

Answer

They fold backward, lying flat against the roof of the mouth

When closed, the fangs fold backward against the roof of the mouth to protect them from breaking as the snake moves or feeds on non-prey items.

When a pit viper's mouth is closed, what happens to its solenoglyphous fangs?
classificationreptileFeaturesnakeviper