|The past range of Bombus affinis.|
The rusty-patched bumblebee (Bombus affinis) is a bumblebee in the subfamily Apinae. Its historical range in North America has been throughout the east and upper Midwest of the United States, north to in Ontario, Canada, where it is considered "species at risk", east to Quebec, south to Georgia, and west to the Dakotas. Its numbers have declined in 87% of its historical habitat range.
As its name suggests, it has a rusty-coloured patch bordered by yellow on the first half of its abdomen. It is medium- to large-sized bumble bee with an annual lifecycle. It is an excellent pollinator of wildflowers, cranberries, and other important crops, including plum, apple, alfalfa, and onion.
Until the 1980s, it was one of the most common species of bumblebee in southern Ontario. Since then, the species has had a drastic decline and is now difficult to find in its normal range. The only locality within Ontario where the rusty-patched bumblebee has been seen in the last five years is Pinery Provincial Park (Lambton County) despite widespread surveys in Ontario. The Ontario Ministry of Natural Resources has begun a recovery project aimed at protecting the species and critical habitats centred in Pinery Provincial Park. These threats have been proposed as the cause of population decline: pathogen spillover from other species, pesticide use, and habitat fragmentation and loss. Surveys from 2001-2008 have located bombus affinis populations only in Illinois, Iowa, Maryland, and Southern Ontario.
|Wikispecies has information related to: Bombus affinis|
- "Bombus affinis". Biolib.cz. Retrieved 18 Sep 2013.
- Rusty-patched Bumble Bee, Xerces Society
- "Rusty-patched Bumble Bee (Bombus affinis) in Ontario Ontario Recovery Strategy Series". Recovery strategy prepared under the Endangered Species Act, 2007. Ministry of Natural Resources. 2011. Retrieved 8 August 2012.
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