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.
The bumblebees Bombus bifarius and Bombus vancouverensis (excuse lack of italics - the software does not alow it in this section) can have orange bums.
There are some that can be orange yes! There are a lot of different species of carpenter bee that can range from black, to orange to many other metallic shades!