White-Tailed Bumble Bee

Fascinating facts about the White-Tailed Bumble Bee

• The queen of Bombus lucorum can grow up to 22 mm long, span about 36 mm across its wings, and weigh as much as 0.70 g. By contrast, the workers shrink to just 12-18 mm and tip the scales at only 0.04-0.32 g. with the massive queen focused on egg-laying and the tiny workers handling the daily grind.
• A single B. lucorum nest can house up to 400 workers, rivaling the size of a small classroom, and they often take over abandoned mouse or vole burrows underground. By reusing these pre-made chambers, the queen saves energy that would otherwise be spent digging, allowing her to focus on laying the first batch of eggs. This clever shortcut helps the species thrive in diverse habitats, from farmland to town gardens, where old rodent tunnels are plentiful.
• Bombus lucorum is among the first bumblebees to break winter's hold, with queens emerging as early as February and, in southern Britain, usually by March. Workers then appear between late March and mid-May, building colonies that can swell to 400 individuals, while males wait until August to take to the air.
• Unlike many bumblebees, B. lucorum sports a short tongue, so it often visits flowers with shallow corollas or daisy-type heads. When the nectar sits too deep, the bee uses the horny sheath around its tongue to punch a hole straight through the flower, siphoning the sweet liquid without ever touching the pollen. This "nectar robbing" lets the bee feed efficiently but leaves the plant unpollinated and a tiny wound for other insects to exploit.
• Male B. lucorum scent-mark their routes with a cocktail of sixty volatile compounds, over half of which (53 %) is ethyl (z)-tetradec-9-enoate. The blend also includes ethyl dodecanoate (6 %), ethyl tetradecanoate (2 %), ethyl (Z)-hexadec-9-enoate (4 %), ethyl (Z)-octadec-9-enoate (2 %), hexadecan-1-ol (4 %), (Z,Z,Z)-octadeca-9,12,15-trien-1-ol (1 %) and (Z)-hexadec-7-enal (2 %). This chemically rich signature helps females locate mates along the male's patrol path, turning a simple flight line into a sophisticated communication highway.

Sources

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

• Wikipedia

At a glance

About the White-Tailed Bumble Bee

In the warm, golden light of a summer's day, the White-Tailed Bumble Bee dances through the air, its fuzzy, yellow and black body a blur of motion as it flits from flower to flower, collecting nectar with reckless abandon. With a gentle hum, it navigates the intricate landscape of petals and stems, its long, extendable tongue dipping deep into the heart of each bloom, gathering the sweet rewards that will sustain its colony through the coming winter. As it moves, its white tail flicks back and forth, a distinctive signature that sets it apart from its fellow bumble bees, a unique characteristic that has captivated the hearts of naturalists and bee enthusiasts alike.

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