Bombus insularis, commonly known as the Insular bumblebee, is a species of bumblebee found in various islands in the Pacific Ocean. It is characterized by its large size, with queens reaching up to 2.5 cm in length. The Insular bumblebee has a distinctive black body with yellow bands, and it plays a crucial role in pollination of native plants in its island habitats. However, due to habitat loss and invasive species, Bombus insularis is considered endangered.