Bombus distinguendus (Great Yellow Bumblebee)
This is a rare UK priority conservation species that is still locally common on the machair grassland of the Outer Hebrides. It requires large expanses of natural and semi-natural grassland with a high density of flowering legumes, particularly common bird's-foot trefoil and red clover; stands of common knapweed are also important. Areas of tussocky, taller grasses are important as nesting sites.
Scottish Biodiversity List of species of principal importance for biodiversity conservation
Bombus distinguendus queens and workers are unmistakable in Britain with their large size, extensively yellow hair, and black band between the wing bases