What is the primary initial survival response of the De Brazza’s monkey when facing a threat?

Answer

Freezing motionlessly.

Unlike primates that flee aggressively, the De Brazza’s monkey's first response to danger is often to freeze, remaining completely motionless for surprisingly long durations, sometimes up to eight hours.

What is the primary initial survival response of the De Brazza’s monkey when facing a threat?
speciesconservationstatusMonkeyPrimate