If you are trying to identify a bee with an orange stripe or a bee with an orange bum, there are a few candidates, all of whom are amazing little friends to have in your garden.
These bumblebees are the subject of a current taxonomical debate as to which is which and which species has what range etc. This is normal with taxonomy.
3. The Bumblebees Bombus Bifarius and Bombus Vancouverensis
Bombus ternarius. These bumblebees are really fascinating to watch, and also to understand their biology. They are adapted to deal with a relatively cold environment and produce seasonal nests.