Top 10 Animals with a Throat Pouch (Gular Pouch)

Metal_Treasure
Sometimes the gular skin forms a flap, or gular pouch (aka throat pouch/sac, gular sac, vocal sac or gular fold). Gular skin (throat skin) is an area of the skin on the throat that has specific functions (on birds the skin is featherless).

Usually the throat pouch has one of these 3 purposes:
1) to store fish and other prey while hunting
2) some male animals just inflate it to attract mates during the breeding season
3) some animals use the pouch for vocalization (vocal sac) - to communicate, scare off rivals, to proclaim territory or dominance, and to locate and attract a mate. Vocal sacs amplify the sounds.

The Top Ten

1 Pelican Pelican

Its pouch probably has the capacity of a shopping cart!
The guy in the image just put a fish in it. Its pouch is expandable and can get bigger. - Metal_Treasure

2 Frigate Bird Frigate Bird

Males have a red gular pouch that they inflate into a huge red balloon by forcing air into the sac that can last for over 20 minutes. They do this during the breeding season to attract females, during courtship display. - Metal_Treasure

3 Grey Crowned Crane Grey Crowned Crane

It has a bright red inflatable throat pouch. - Metal_Treasure

4 Frog Frog Frogs are a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura.

Some of them have a vocal sac. The vocal sac is the flexible membrane of skin possessed by most male frogs.
Frog species without vocal sacs can only be heard within a radius of a few meters, whereas some species with vocal sacs can be heard over 1 km (0.62 mi) away. - Metal_Treasure

5 Sage Grouse Sage Grouse

It's a bird found in the North-central and Western United States, and the Canadian provinces of Alberta and Saskatchewan.
The male sage grouse has two gular sacs that it inflates to attract mates. - Metal_Treasure

6 Orangutan Orangutan

Orangutans have inflatable sacs - Metal_Treasure

7 Green Anole Green Anole

It's a lizard with an extended retractable gular fold - Metal_Treasure

8 Walrus Walrus The walrus is a large flippered marine mammal with a discontinuous distribution about the North Pole in the Arctic Ocean and subarctic seas of the Northern Hemisphere.

The walrus has an air sac under its throat which acts like a floatation bubble. - Metal_Treasure

9 American Toad American Toad

On the image it's with the vocal sac inflated - Metal_Treasure

10 Cormorant
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