Bombus hyperboreus

Bombus hyperboreus is a species of Arctic bumblebee with a circumpolar distribution. The species is primarily found in the arctic areas of Canada, Alaska, Greenland, northern Scandinavia, and Russia. However, more recently (2015) the nearctic bumble bee, Bombus natvigi has been separated from this species, based on genetic analysis. Then, Bombus hyperboreus is limited to the Palaearctic.
It is a brood parasite, and attacks and enslaves other bumblebee colonies in order to reproduce as they do not even have the ability to produce workers themselves. Most of its targets are colonies of species of the same subgenus, Alpinobombus.
== Description ==
Due to its parasitic lifestyle, workers are rarely present. Queens and drones are similar, with the thorax and anterior part of the abdomen brownish-orange. The thorax has a black transversal band, while the last abdominal segments are black. Because the environment the species inhabits is cold and windy, it is suggested that their black bands act as a method to increase their body temperature through solar radiation, and their long, dense hair coat minimizes insulation loss. The mean length of the queen is relatively large at 18.4 millimetres (0.72 in) and is presumed to allow the species to counter the strong effects of the windy and cold environment.
Check out Wikipedia for more details!