Silvery Gibbon birth at the Hellabrunn Zoo in Munich, Germany

Silvery gibbons, native to the Indonesian island of Java, are endangered, primarily as a result of habitat loss due to deforestation.

According to the advocacy group the Silvery Gibbon Project, an estimated 98% of the gibbons' forest home has been destroyed through logging and tree clearance to make room for expanding human developments. It's believed that only a few thousand remain in the wild, and a small number live in zoos.