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A bumblebee (or bumble bee, bumble-bee, or humble-bee) is any of over 250 species in the genus Bombus, ... pesticide use negatively affects colony development and size.
Historically, Bombus occidentalis, the so-called "western bumble bee" was the most common species, ... primarily in colony sizes of about 200-300 workers.
Bombus impatiens, the common eastern bumblebee, is the most commonly encountered bumblebee across much of eastern North America. [3] They can be found in the Eastern temperate forest region of the eastern United States, southern Canada, and the eastern Great Plains. [4]
The female workers care for the nest and eggs, whereas the queen lays eggs. This process of egg to adult bee takes about 4–5 weeks. [13] Initial workers forage and increase the colony size by bringing resources for growth. Thus, workers that hatch later in the year, around midsummer, tend to be larger than initial worker bees. [13]
B. terrestris is unique compared to other bees in that their caste of workers exhibit a wide variation in worker size, with thorax sizes ranging from 2.3 to 6.9 mm in length and masses ranging from 68 to 754 mg. [4]
The size of the radial cell in the wing differs for each. ... Bumble bee colonies are annual and a new colony is founded when a mated queen, the foundress, emerges ...