Gorillas are the largest of all primates and there are only two remaining species - eastern and western gorillas. Gorillas share many human-like characteristics and live in family troops led by a dominant male silverback. While large in size, gorillas are generally gentle and protect their families, communicating through verbal and non-verbal methods. Gorillas are intelligent animals that forage daily and never sleep in the same place twice. Their populations are declining due to human activities like habitat destruction.