step three.step 1 Types breakdown
They have a primary deal with and you may language size in accordance with really almost every other bumble bees. The newest upperside out-of the majority of the new instinct is black, but there is a unique, greater band of golden-yellow hair all over locations 2 and you can step 3 (Figure step one). Segment 5 is actually black otherwise pale yellow-brownish.
The fresh men are similar when you look at the colour towards the women, while they often have a whole lot more red-colored hairs toward face. He’s advanced in dimensions between queens and experts, and get relatively brief antennae (COSEWIC 2015). For more information on morphology, pick Williams mais aussi al. (2014).
The latest Yellow-banded Bumble-bee is earlier experienced conspecific to the West Bumble Bee ( Bombus occidentalis) but Bertsch ainsi que al. (2010) and you will Williams ainsi que al. (2012) reported mitochondrial CO1 sequences sufficiently divergent to take on the two ) located consistent morphological and unit letters supporting two type of kinds.
Contour 1. King Red-banded Bumble-bee on the willow, Ontario. T2 and you may T3: Abdominal tergites dos and you will step 3. Photo: Sarah Johnson. Combined with permission.
Contour step one illustrates an image of a near-upwards from a king purple-banded Bumblebee for the willow, Ontario. It shows that new instinct of one’s Purple-banded Bumblebee is actually black and there’s an over-all set of golden-yellow round the its areas dos and you may 3 with segments 5 becoming black colored.
step three.dos Variety people and you will shipment
The fresh Purple-banded Bumble bee takes place just in The united states. They selections regarding Georgia northern to Labrador, and west through the northern All of us and you can Canada so you can Montana, Uk Columbia (BC), the latest Northwest Regions (NT), in addition to southeastern Yukon (YT) (Profile dos). Its north restriction roughly comes after latitudinal treeline. Earlier suggestions from Alaska (age.grams., just like the shown inside the COSEWIC (2015)) being reassessed, in addition to Yellow-banded Bumble bee is no longer considered to be part of one to nation’s fauna (Sikes and you can Rykken 2020). Up to fifty-60% of their internationally diversity is within Canada (COSEWIC 2015).
territory except Nunavut (NU) (COSEWIC 2015), although it might occur on the unsurveyed southwest spot of these region (Shape dos). Regarding YT it’s absent to the west of this new Mackenzie Hills, however it range widely to your central section of BC (COSEWIC 2015).
Shape dos. Globally range of Red-colored-banded Bumble bee. Observations (museum specimens and you may images affirmed in iNaturalist (2020) and you will Bumble-bee View (2019)) while the 2009 are illustrated by the dark blue dots. Northern restrict regarding variety unsure, particularly in main Canada. Study out of L. Richardson and you can S. Cannings, map of the B. Fournier (Bodies off Northwest Regions). Dataset isn’t total; certain specimens (elizabeth.g. those who work in Prescott et al. 2019) were not integrated because the analysis is acquired just after .
Shape 2 suggests the global selection of the latest Red-colored-banded Bumblebee. The number extends away from Georgia northern in order to Labrador and west using this new north All of us and Canada so you can Montana, Uk Colombia additionally the Northwest Areas. It occurs in just about any Canadian state and you can region but Nunavut. The fresh findings of the variety ranging from 1824 and you can 2008 is actually presented with white dots and the observations of your varieties ranging from 2009 and you will 2019 are presented having deep blue dots.
The brand new Red-banded Bumble-bee was previously one of the most common bumble bees away from east and boreal Canada but its wealth southern colombian cupid away from new boreal places began to decline in the early 1990s. Trend data is actually imperfect, nevertheless top available study set suggests relative abundance (Yellow-banded Bumble bee in line with every bumble bees) in the 10 regional websites round the southern area (sub-boreal) Canada (out of 100 Distance Domestic, BC, and you can Edmonton eastern through Ottawa and you may Montreal with the Atlantic Provinces) -2013 (Table 2 into the COSEWIC 2015). Generally speaking, brand new Purple-banded Bumble bee has actually maintained their wide range regardless of the declines; the only Canadian exemption are high southwest Ontario (we.elizabeth. southern and to the west of Kitchener-Waterloo), the spot where the types is actually always uncommon and you will partners if any has actually become located given that 2004 (Colla and you will Dumesh 2010; COSEWIC 2015, iNaturalist 2020).
