American Bumble Bee

Fascinating facts about the American Bumble Bee

• From February to November/December, a B. pensylvanicus colony can swell to over 200 workers, each born after a 4-5-week development cycle from egg to adult. This rapid buildup fuels pollination of sunflowers and clovers across fields, yet the late-summer surge also brings a shift where male bees grow as large as queens, eventually leading to the queen's death by worker stings. The timing shows how the colony's internal clock drives both ecosystem services and its own demise.
• Bombus pensylvanicus queens measuring 22-26 mm, while workers are 13-19 mm. This size gap lets the queen dominate the colony hierarchy.
• Across its range, B. pensylvanicus has vanished from many sites, with its numbers dropping nearly 90 % in just the first two decades of the 21st century. This steep decline turned a once-abundant southern pollinator into a vulnerable species.
• Genetic studies in Illinois reveal that modern B. pensylvanicus populations show greater structure and slightly reduced diversity compared with historic samples, indicating limited gene flow.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the American Bumble Bee

As the warm sunlight dances across the vibrant tapestry of a summer meadow, the American Bumble Bee emerges, its fuzzy, black-and-yellow body a blur of motion as it hurtles from bloom to bloom with reckless abandon, collecting nectar and pollen with an industrious zeal that belies its precarious existence. With its agile, rotary flight, this remarkable creature navigates the intricate landscape of flowers and grasses with ease, its proboscis uncoiling like a delicate, thread-like tentacle to sip from the sweet, hidden depths of each blossom. As it moves through the world, the American Bumble Bee is a testament to the beauty and resilience of a species clinging to survival in a world of fading wildflowers and dwindling habitats.

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