Insects diurnal

Black-tailed Bumble Bee

Bombus melanopygus

The early-rising gem of the West, the Black-tailed Bumble Bee brings a splash of orange to the garden before spring has even fully arrived. These fuzzy, docile pollinators are a favorite for backyard observers and a vital part of the western ecosystem.

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Quick Identification

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Size

Queens: 15–18 mm (0.6–0.7 in); Workers/Males: 9–13 mm (0.35–0.5 in). Wingspan: 20–30 mm (0.8–1.2 in).

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Colors

Thorax has a 'cloudy' mix of yellow and black hairs; the abdomen features prominent orange-red bands on segments 2 and 3, followed by black and yellow segments.

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Key Features

Vibrant orange/red band across the middle of the abdomen
Cloudy or 'shaggy' appearance of yellow and black hairs on the thorax
Small to medium stocky build
One of the first bee species to emerge in early spring

When You’ll See Them

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Activity pattern diurnal

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Peak hours 9 AM – 4 PM

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Season February to July

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Diet A generalist forager that feeds on nectar and pollen from a wide variety of flowers, with a strong preference for native early-bloomers like flowering currants, lupines, and ceanothus.

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Habitat Highly adaptable, found in suburban gardens, urban parks, mountain meadows, and coastal scrub throughout western North America.

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Behavior

The Black-tailed Bumble Bee is an industrious and hardy pollinator, often the very first bee seen in western gardens as winter fades. Unlike many other bees that wait for hot summer days, this species is capable of 'buzz pollination'—vibrating its flight muscles to generate heat and shake pollen loose. This allow them to forage on chilly, overcast mornings that would keep other insects grounded.

As social insects, they live in annual colonies. A single queen, who has spent the winter hibernating underground, emerges in late February or March to find a nesting site, typically in an abandoned rodent burrow or beneath thick bunchgrass. They are remarkably docile and non-aggressive unless their nest is directly disturbed, making them excellent neighbors for backyard gardeners.

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Camera Tips

To capture the Black-tailed Bumble Bee on camera, focus your efforts on early-season 'magnet' plants. Because they emerge so early in the year, placing your camera near flowering currants (Ribes) or Oregon Grape in late February is the best way to catch the large, impressive queens. Set your camera on a tripod or mount it within 12 to 18 inches of a dense cluster of blooms rather than a single flower to increase the chances of the bee staying within the frame.

Since bumble bees move quickly and erratically, a high shutter speed or high-frame-rate video setting is essential. If you are using an AI-powered camera, ensure the 'Macro' or 'Close-up' focus mode is enabled. Position the camera so the sun is at its back; this illuminates the bee's fuzzy texture and the specific orange banding on its abdomen, which are key for identification. Avoid shooting into the sun, as the resulting silhouette will obscure the colorful markings that distinguish this species from other bumble bees.

Placement height is critical. Most foragers will be active at eye-level on shrubs or low to the ground on wildflowers. An angle that captures the bee from the side or slightly from above is best for seeing the abdominal segments. If you suspect a nest is nearby—often indicated by bees repeatedly entering a hole in the ground or a gap in a stone wall—position the camera 3 feet away. Do not place the camera directly over the entrance, as this can confuse the bees and alter their natural behavior.

Seasonal timing is everything with this species. Their populations peak in late spring. By mid-summer, the colony begins to die off, and you will see fewer workers. To get the best variety of footage, keep your camera active from the first warm day of March through June. During this window, you may capture the transition from the large founding queens to the smaller, high-energy workers that take over foraging duties.

Similar Species

Species that look similar or are commonly confused with Black-tailed Bumble Bee.

Orange-belted Bumble Bee

Has much cleaner, more distinct color bands on the thorax compared to the 'cloudy' mix of the Black-tailed.

Hunt's Bumble Bee

Features a very bright yellow thorax with a clean black band, lacking the 'shaggy' gray/yellow mix of the Black-tailed.

Red-belted Bumble Bee

The red bands on the abdomen are usually darker and positioned further down the tail than the bright orange of the Black-tailed.

Frequently Asked Questions

They are most active from mid-morning to late afternoon, usually between 9 AM and 4 PM. However, because they can generate their own body heat, they often start foraging earlier in the morning than most other bee species.

Plant early-blooming native shrubs like Flowering Currant, Ceanothus, and Manzanita. Providing 'messy' areas of the garden with bunchgrass or leaf mulch can also provide the queens with the nesting sites they need to start a colony.

Adults eat nectar for energy, while they collect pollen to provide protein for their developing larvae. They are especially fond of bell-shaped flowers where they can use their 'buzz pollination' technique.

Yes, they are very common in suburban areas across the West Coast and Pacific Northwest. They thrive in gardens that offer a variety of native plants and chemical-free environments.

The Black-tailed Bumble Bee has a 'cloudy' thorax with mixed black and yellow hairs, whereas the Orange-belted Bumble Bee (B. ternarius) usually has very distinct, clean bands of color and a black 'V' shape on its thorax.

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