What is a "western lowland gorilla"?

The western lowland gorilla is the smallest of the four gorilla subspecies and is characterized by its muscular body, black fur, and large size, with males weighing up to 400 pounds. They have a broad chest and a distinctive sagittal crest on their forehead. Western lowland gorillas are primarily herbivorous, feeding on leaves, stems, fruit, and flowers. They live in social groups called troops, led by a dominant silverback male, and have complex social dynamics, including intricate communication and social behaviors. Western lowland gorillas are critically endangered due to habitat loss, poaching, and diseases such as Ebola, and conservation efforts are underway to protect them and their dwindling populations in the wild.