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.
(from: wikipedia - siamang)
Siamang apes go wild - diana feeney
Kid Facts - Blast from the past: Black Panther