Scientists unlock secret of proboscis monkeys

Haven of their own: Proboscis monkeys resting along the Kinabatangan river, one of the last strongholds for the population in Sabah.

KOTA KINABALU: There is a secret to Sabah’s iconic male proboscis monkeys – when they become bigger, so will their body and testicles.

But more importantly, the males with a bigger nose can attract more females.