Bumblebee

Overview

The buff-tailed bumblebee (Bombus terrestris) is among the largest and most widespread bumblebee species in Europe. This species forms annual colonies with a single queen and hundreds of workers, playing a crucial role in pollinating both wild and cultivated plants. The species exhibits the classic bumblebee appearance with a dense coat of hair and striking black and yellow bands, plus the distinctive buff-colored tail that gives it its common name. Bombus terrestris has been commercially reared for pollination services, particularly in greenhouse tomato production, and has been introduced to regions outside its native range including South America, Japan, and New Zealand. These introductions have raised ecological concerns about competition with native pollinators and disease transmission. The species is highly adaptable and can nest in a variety of underground cavities, including abandoned rodent burrows. As a generalist pollinator, B. terrestris visits a wide range of flowering plants and demonstrates advanced foraging behavior including buzz pollination, where the bee vibrates flight muscles to release pollen from flowers. Queens emerge from hibernation in early spring to establish new colonies, which grow throughout summer before producing new queens and males in late summer and autumn. The species faces threats from habitat loss, pesticide exposure, and diseases, though it remains relatively common across much of its range.

How to identify

Bombus terrestris workers are 11-17mm long, while queens reach 20-23mm. The species displays two yellow bands—one on the collar behind the head and another on the abdomen—with black coloration between and a distinctive buff-white or yellowish tail. Queens are noticeably larger and more robust than workers. Males have more yellow on the face and body. The deep, loud buzzing sound is characteristic when foraging. The species can be confused with other Bombus species but the buff-colored tail tip is diagnostic in combination with the banding pattern.

Habitat

Found in diverse habitats including gardens, parks, farmland, woodland edges, grasslands, and urban areas. Nests are typically established underground in abandoned small mammal burrows, under sheds, or in compost heaps. Requires access to diverse flowering plants from early spring through autumn.

Distribution

Native to Europe (from southern Scandinavia to the Mediterranean), North Africa, and temperate Asia extending to western Siberia. Introduced populations established in New Zealand, Japan, Chile, Argentina, and Tasmania. One of the most widespread and common bumblebee species in its native range.

Diet

Adults feed on nectar for energy and collect pollen as protein for developing larvae. Generalist foragers visiting a wide variety of flowering plant species including legumes, deadnettles, thistles, and many garden and crop plants. Capable of buzz pollination to extract pollen from tubular flowers.

Behavior

Social species living in annual colonies of 100-400 individuals. Queens emerge from hibernation in early spring (February-March) and search for suitable nest sites. Workers forage during daylight hours, often starting earlier and finishing later than other bee species. Demonstrates sophisticated foraging including flower constancy and the ability to learn and remember rewarding flower patches. Can forage in cooler temperatures and lower light conditions than many other bees.

Reproduction & life cycle

Annual colony cycle begins when mated queens emerge from winter hibernation in spring. The queen establishes a nest, lays eggs, and rears the first brood of workers herself. Once workers emerge, they take over foraging and nest maintenance while the queen focuses on egg-laying. In late summer, the colony produces new queens and males (drones). After mating, new queens find hibernation sites while males, workers, and the old queen die before winter.

When to look

Queens emerge February-March in spring; workers active April-October; new queens and males produced August-September; only mated queens survive winter in hibernation.

Cultural significance

Widely used commercially for greenhouse pollination of tomatoes and other crops, representing a major pollination industry. Featured in children's literature and educational materials about pollination. The species has become a model organism for studying bee behavior, navigation, and learning. Its introduction outside native ranges has generated significant scientific and public debate about biosecurity and ecological impacts.

Similar species

• Bombus lucorum (white-tailed bumblebee)
• Bombus magnus (large garden bumblebee)
• Bombus cryptarum (cryptic bumblebee)

Watch on YouTube