From April to November.
Tussocks or Old burrows
How To Identify Red-Tailed Black Bumblebees
These guys have a Black body with an orange tail. A male red tailed bumblebee will have a yellow ruff.
There are x3 species of this bee and each one has slightly different markings. Out of these 3 you are most likely to see the red-tailed bumblebee. If you want to help bees out, check the critter for dark-winged red-tailed cuckoo bees which are nest parasites!