What is a Gular Sac?

A Gular Sac is the throat pouch on some birds.

A Gular Sac is a featherless pouch, or bag, or sac, that is formed by the skin from the lower beak to the neck.

It is used to store fish.

Examples of birds that have a Gular Sac include the Frigate Bird, Pelican, Marabou Stork, and Hornbill. 

Photographer: Martina Nicolls

Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM