Adult male Lowland gorilla at the Miami Metrozoo

Adult male lowland gorilla crouched in its habitat at Miami Metrozoo

Adult male lowland gorilla holding a stick while seated in its habitat at Miami Metrozoo

Adult male lowland gorilla howling in its habitat at Miami Metrozoo

Adult male lowland gorilla on its hands and feet in its habitat at Miami Metrozoo

Adult male lowland gorilla putting its fists to its chest at Miami Metrozoo

Adult male Lowland gorilla raising its hands to its chest at Miami Metrozoo

Adult male lowland gorilla seated against a tree in its habitat at Miami Metrozoo

Adult male Lowland gorilla seated in habitat being viewed by visitors at the Miami Metrozoo

Adult male lowland gorilla seated in its habitat at Miami Metrozoo

Adult male Lowland gorilla standing within his habitat at the Miami Metrozoo

Adult male Lowland gorilla walking in habitat at Miami Metrozoo

Adult male lowland gorilla walking through boulders in its habitat at Miami Metrozoo

Adult male nyala and its young standing in their habitat at Miami Metrozoo

Adult male nyala standing in the greenery of its habitat at Miami Metrozoo

Adult male nyala walking towards other nyala in their habitat at Miami Metrozoo

Adult male Sumatran orangutan and a young one by a wooden pillar at Miami Metrozoo

Adult male Sumatran orangutan laying on the ground against some rocks at Miami Metrozoo

Adult male Sumatran orangutan seated beside a rock-face in its habitat at Miami Metrozoo

Adult male Sumatran orangutan sitting in the shade of a rock-face at Miami Metrozoo