North Dakota’s short summers force bumble bee queens to emerge quickly and establish colonies within a narrow window. This Bumble Bees In North Dakota Guide will help you understand, protect, and even attract these essential pollinators across the Peace Garden State.
Bumble bees are not just fuzzy and cute. They are powerhouse pollinators for your garden, wildflowers, and even crops like sunflowers and canola. North Dakota is home to several species, each adapted to our unique climate.
Let’s get straight into what you need to know about these hardworking insects.
Why Bumble Bees Matter In North Dakota
Bumble bees are one of the first bees out in spring. They can fly in cooler temperatures than honey bees. This makes them vital for early blooming plants.
In North Dakota, our growing season is short. Bumble bees maximize every warm day. They use a technique called “buzz pollination.” This shakes pollen loose from flowers like tomatoes, blueberries, and cranberries. Honey bees cannot do this.
Without bumble bees, many native plants would struggle to reproduce. Our agriculture also benefits. Studies show bumble bees increase sunflower seed yields by up to 25%.
Key Species Found In North Dakota
You might see several species around your yard or farm. Here are the most common ones:
- American bumble bee (Bombus pensylvanicus) – Large, with a yellow thorax and a black band between the wings. Numbers are declining.
- Yellow-banded bumble bee (Bombus terricola) – Has a yellow band on the abdomen. Prefers grasslands.
- Two-spotted bumble bee (Bombus bimaculatus) – Common in gardens. Has a yellow spot on the side of the abdomen.
- Hunt’s bumble bee (Bombus huntii) – Small and active. Often seen on clover and alfalfa.
- Western bumble bee (Bombus occidentalis) – Once common, now rare in the wild. You might find them in managed colonies.
Each species has slightly different nesting habits. Some nest underground in old rodent holes. Others nest in grass clumps or bird boxes.
Bumble Bees In North Dakota Guide: Life Cycle
Understanding their life cycle helps you support them at the right time. Here is how a bumble bee colony works in North Dakota.
Spring: Queen Emergence
In late March or early April, mated queens wake up from hibernation. They have spent the winter buried in soil or leaf litter. The queen is alone at first.
She needs to find food quickly. Early flowers like pussy willow, dandelion, and crocus are critical. She also searches for a nest site.
Once she finds a spot, she builds a wax pot for nectar and pollen. She lays her first batch of eggs. She incubates them by shivering her flight muscles. This keeps the brood warm even on cold spring days.
Summer: Colony Growth
The first workers emerge after about three weeks. These are small female bees. They take over foraging and nest duties. The queen stays inside to lay more eggs.
By July, a healthy colony has 50 to 200 workers. They forage on a wide range of flowers. In North Dakota, they love clover, alfalfa, sunflowers, and native prairie plants.
The colony grows quickly. Workers collect pollen and nectar. They store some for rainy days. The nest temperature stays around 30°C (86°F).
Late Summer: New Queens And Males
In August, the colony shifts focus. The queen starts laying unfertilized eggs. These become males (drones). She also lays eggs that become new queens.
Males leave the nest to find mates. They do not collect pollen. They just fly around looking for virgin queens. New queens mate once and then store sperm for the next year.
By September, the old queen and workers die. The new queens fatten up on late flowers. They find a safe place to hibernate. The cycle starts again next spring.
Winter: Hibernation
Only the mated queens survive winter. They dig into loose soil or under leaf piles. Their bodies produce a natural antifreeze. This prevents ice crystals from forming.
In North Dakota, winters are harsh. Snow cover actually helps insulate them. If you disturb a hibernating queen, she might not survive. Leave leaf litter and brush piles alone until spring.
How To Attract Bumble Bees To Your Yard
You can make your garden a haven for bumble bees. It does not require a lot of work. Here are simple steps.
Plant Native Flowers
Bumble bees prefer native plants. They have co-evolved with them. Good choices for North Dakota include:
- Purple coneflower (Echinacea)
- Black-eyed Susan (Rudbeckia)
- Bee balm (Monarda)
- Goldenrod (Solidago)
- Asters (Symphyotrichum)
- Wild bergamot
- Prairie clover
Plant in clumps of at least three feet wide. This makes it easier for bees to find and forage efficiently.
Provide Nesting Sites
Bumble bees need places to nest. Leave some bare ground in sunny spots. Avoid tilling every inch of your garden.
You can also build a simple bumble bee nest box. Place it on the ground or slightly buried. Fill it with dry grass or mouse fluff. Face the entrance away from prevailing winds.
Do not disturb the nest once bees move in. They are not aggressive, but they will defend themselves if provoked.
Avoid Pesticides
Pesticides are a major threat to bumble bees. Even “organic” ones can harm them. Neonicotinoids are especially dangerous. They affect the bee’s nervous system and navigation.
If you must use pesticides, apply them at dusk. Bees are less active then. Choose spot treatments instead of spraying the whole yard.
Provide Water
Bumble bees need water. They do not use bird baths easily because they can drown. Create a shallow dish with pebbles or marbles. Keep the water level below the pebbles. This gives them a safe place to land.
Change the water every few days to prevent mosquitoes.
Common Threats To Bumble Bees In North Dakota
Bumble bee populations are declining across North America. North Dakota is not immune. Here are the main threats.
Habitat Loss
Native prairies are disappearing. They are replaced by cropland or development. Bumble bees lose their nesting sites and food sources.
Roadsides and ditches are often mowed too early. This destroys nests and removes flowers. If you can, leave some areas unmowed until late fall.
Pesticide Exposure
Agricultural pesticides drift onto wildflowers. Even low doses can weaken bumble bee colonies. They may produce fewer queens, which affects next year’s population.
Fungicides are also a problem. They can make bees more susceptible to disease. Always read labels and avoid spraying blooming plants.
Climate Change
Warmer springs can cause queens to emerge too early. They might not find enough food. Extreme weather events like floods or droughts also harm colonies.
In North Dakota, we have seen more severe storms. These can flood underground nests. Providing well-drained nesting sites helps.
Disease And Parasites
Bumble bees can catch diseases from honey bees. Commercial bumble bee colonies sometimes escape and spread pathogens. This is a serious concern for wild populations.
Tracheal mites and gut parasites can weaken bees. You can help by keeping your garden clean. Remove dead flowers and debris that might harbor pathogens.
How To Identify Bumble Bees Vs. Other Bees
Many people confuse bumble bees with carpenter bees or honey bees. Here is a quick guide.
- Bumble bees – Fuzzy, round, with bold yellow and black bands. They are large and slow. They have a loud, low buzz.
- Carpenter bees – Look similar but have a shiny, black abdomen. They are solitary and drill holes in wood.
- Honey bees – Smaller and more slender. They have a golden-brown color. They live in large colonies in hives.
- Mason bees – Small, dark, and metallic blue or green. They are solitary and nest in hollow stems.
Bumble bees are the only ones that form small colonies in the ground. If you see a bee flying low over the grass, it is likely a bumble bee scouting for a nest site.
What To Do If You Find A Bumble Bee Nest
Finding a nest in your yard can be surprising. Here is what to do.
- Stay calm. Bumble bees are not aggressive unless you threaten their nest.
- Keep your distance. Do not block the entrance. Do not step on the nest.
- Watch from afar. Enjoy watching them come and go. They are fascinating.
- Keep pets away. Dogs and cats might dig at the nest. This can provoke stings.
- Do not use pesticides. They will kill the colony and contaminate the soil.
- Wait it out. The colony will die naturally in fall. The queen will leave and hibernate elsewhere.
If the nest is in a high-traffic area, you can call a local beekeeper or pest control company that relocates bumble bees. They can move the nest safely.
Bumble Bees In North Dakota Guide: Conservation Tips
You can be a bumble bee champion. Here are practical ways to help.
Join A Citizen Science Project
Bumble Bee Watch is a great program. You can upload photos of bumble bees you see. Experts identify them and track populations. This helps scientists understand where species are thriving or declining.
You can also join the Xerces Society’s bumble bee surveys. They provide training and materials.
Create A Pollinator Patch
Even a small patch helps. Plant a mix of early, mid, and late-season flowers. This provides food from spring to fall.
Include native grasses for nesting material. Leave some stems standing over winter. Many bees hibernate inside hollow stems.
Support Local Farmers
Buy organic or pesticide-free produce when possible. Support farmers who use integrated pest management. This reduces chemical use in your area.
You can also talk to your local garden club or extension office. Encourage them to plant pollinator-friendly plants in public spaces.
Educate Others
Share what you learn about bumble bees. Many people fear them because they look big. Explain that they are gentle and rarely sting unless handled.
Teach children to observe bees from a distance. Show them how bees pollinate flowers. This builds respect for nature.
Frequently Asked Questions
Are Bumble Bees In North Dakota Dangerous?
No. Bumble bees are not aggressive. They only sting if you step on them or grab them. Their sting is painful but not dangerous unless you are allergic. Leave them alone and they will leave you alone.
What Is The Best Time To See Bumble Bees In North Dakota?
Late spring through early fall. The peak is July and August when colonies are largest. You will see them on sunny days between 60°F and 90°F.
Can I Keep Bumble Bees In A Hive Like Honey Bees?
It is difficult. Bumble bee colonies are annual. They die each fall. You can buy commercial colonies for greenhouse pollination, but they are expensive. It is better to attract wild bumble bees to your yard.
What Flowers Do Bumble Bees Prefer In North Dakota?
They love native prairie flowers. Top choices include purple coneflower, bee balm, goldenrod, asters, and clover. They also visit sunflowers and alfalfa. Plant a variety to support them all season.
How Can I Tell If A Bumble Bee Is A Queen Or A Worker?
Queens are much larger. In spring, you will only see queens. Workers appear in late May or June. They are about half the size of the queen. Males are medium-sized and have longer antennae.
Final Thoughts On Bumble Bees In North Dakota
Bumble bees are a vital part of our ecosystem. They pollinate our gardens, wildflowers, and crops. By understanding their life cycle and needs, you can help them thrive.
Start small. Plant a few native flowers. Leave a patch of bare ground. Avoid pesticides. You will soon see these fuzzy flyers buzzing around your yard.
Remember, every queen that survives winter is a new colony next year. Your efforts make a difference. The Bumble Bees In North Dakota Guide is your starting point. Now go out and watch them work.
If you have more questions, contact your local extension office. They have resources specific to your area. Happy bee watching.