Sure on genus, not on species - pretty small and scraggly looking; was on echinacea with multiple other Bombus spp.
mallow in the alley
on strawflower with stinkbugs
On sunflower. I can’t find any bumble bees that are known to be in Alberta to have this colouration. The closest one in Alberta would be Bombus insularis, however, this bumble bee looks very similar to Bombus variabilis!
On echinacea in garden (along with several other bees) - bigger indiv in pic one is same as indiv in pic 2.
On a zinnia in back garden - between the smoke and the cool temps, the local bumbles are pretty sluggish right now. Same indiv in all pics.