We just learned about the Hylobates Gibbon.
Another kind of primate is the Siamang.
This is the biggest of all the kinds of gibbons, and can grow to be over 3 feet tall and weigh over 30 pounds.
They are covered in black fur, darker than any other type of gibbon.
When the siamang yells, their throat blows up like a balloon, almost like a bullfrog before they make their sounds.
![siamang](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Siamang_140804.jpg/391px-Siamang_140804.jpg)
![siamang](https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Symphalangus_syndactylus%2C_Chiba_Zoo%2C_Japan.jpg/640px-Symphalangus_syndactylus%2C_Chiba_Zoo%2C_Japan.jpg)
(from: wikipedia - siamang)
Siamang apes go wild - diana feeney
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