Bumblebee

Bumblebees, genus Bombus, belong to the family Apidae within the order Hymenoptera, the same broad family that includes honey bees. Around 250 species of bumblebee are found across temperate and cold regions of the Northern Hemisphere as well as parts of South America.

Bumblebees are notable for their large, robust, densely hairy bodies, which allow them to generate body heat through muscle vibration and forage in cooler, cloudier conditions than most other bee species can tolerate. They are also known for buzz pollination, a technique in which they vibrate their flight muscles to shake pollen loose from certain flowers.

Ecologically, bumblebees are important pollinators of wildflowers and many crops, particularly plants that benefit from buzz pollination such as tomatoes and blueberries, making them a key group for both natural ecosystems and agriculture.

• Large, rounded, robust body covered densely in long, soft hair (pile).
• Bold banding pattern of black and yellow, sometimes with orange or white segments depending on species.
• Two pairs of translucent wings relatively small compared to the bulky body.
• Thick hind legs with pollen baskets used to carry collected pollen.
• Lookalikes: carpenter bees look similar in size but have a shiny, mostly hairless black abdomen, whereas bumblebees have a fully hair-covered abdomen.

Bumblebees are found across temperate regions of North America, Europe, and Asia, favoring meadows, gardens, hedgerows, and woodland edges rich in flowering plants. They are active from early spring through fall, often among the first and last bees seen foraging each season due to their cold tolerance, and typically nest in abandoned rodent burrows, thick grass tussocks, or other insulated cavities.

Bumblebees forage on nectar and pollen from a wide range of flowering plants, using rapid wingbeat vibrations to warm their flight muscles before takeoff in cool weather. They are especially known for buzz pollination, gripping a flower and vibrating to release pollen that would otherwise remain trapped. Colonies are smaller and less complex than honey bee hives, typically numbering from dozens to a few hundred workers, and defend the nest by stinging if directly threatened.

Bumblebees undergo complete metamorphosis: egg, larva, pupa, and adult. In spring, a solitary overwintered queen founds a new nest, laying eggs that develop into worker larvae fed pollen and nectar within wax cells. The colony grows through summer, eventually producing new queens and males in late summer, after which the old colony dies off; only mated new queens survive through winter in sheltered hibernation to start the cycle again the following spring.