How to Identify a Bee Swarm: What You're Looking At and What to Do
Written by Mateo Kaiser, University of California certified Master Beekeeper and 5th generation beekeeper.
Use this guide to identify what you're looking at. If you're unsure, report it anyway, whether it's honey bees, wasps, hornets, or bumble bees, we'll help you figure out the right next step.
Swarms appear most often during swarm season in spring and early summer. You can track current activity in our bee swarm season report.
Common Honey Bee Swarm
Honey Bees (Apis mellifera)
This is the species Swarmed is designed for. Honey bee swarms are often calm while scouts search for a new home.
Swarm Appearance
Honey bee swarms are commonly found clustered on tree branches, fence posts, or building eaves while scouts search for a permanent home. A large, tightly packed cluster of bees hanging from a branch, fence, or other structures. Swarms can contain thousands to tens of thousands of bees.
Key Characteristics
- Size
- Medium, about 15 mm in length.
- Color
- Golden-yellow with dark brown bands.
- Behavior
- Honey bees are social insects and work together in large colonies. Swarms are their way of starting a new colony and are generally very docile. Swarming honey bees are looking for a new home and are less likely to sting unless provoked.
Why Honey Bees (Apis mellifera) Matter
Honey bees are crucial pollinators and are often protected due to their importance in pollinating food crops and wild plants. If you spot a honey bee swarm, reporting it through Swarmed connects you with a local beekeeper who can relocate the colony safely. According to research by Dr. Thomas Seeley at Cornell University, fewer than 1 in 4 swarms survive on their own. A beekeeper changes those odds entirely.
Common Look-Alikes
Not sure what you're looking at? Report it and we'll help you identify it.
Wasps
Swarm Appearance
Wasps do not swarm in the same way honey bees do. They are solitary or live in smaller colonies. If you see a large number of wasps, they are likely near a nest. Not sure if it's bees or wasps? Report it anyway and we'll help point you in the right direction.
Key Characteristics
- Size
- Variable, but generally slender and longer than honey bees, up to 30 mm.
- Color
- Bright yellow and black patterns.
- Behavior
- Wasps can be more aggressive than honey bees and are capable of stinging multiple times. They are carnivorous and often seen around human food sources. Unlike bee hives, wasp nests may be found in the ground.
Why Wasps Matter
Despite often being seen as a pest, wasps play an important role in keeping ecosystems balanced. They eat pests, and some wasps are also important pollinators, just like bees!
Mason Bees
Swarm Appearance
Since mason bees are solitary, you won't find them swarming. You might see many individual bees near nesting sites, often in holes in wood or the ground.
Key Characteristics
- Size
- Small, about 12 mm in length.
- Color
- Metallic blue or green.
- Behavior
- Mason bees are solitary and do not form colonies or swarms. They are excellent pollinators and are often encouraged in gardens.
Why Mason Bees Matter
Mason bees are peaceful and beneficial for pollination. They are a sign of a healthy garden and do not require intervention by a beekeeper or pest control service.
Bumblebees
Swarm Appearance
Bumblebees do not form swarms. If you see a group of bumblebees, they are likely foraging or have a nest nearby.
Key Characteristics
- Size
- Large and robust, up to 25 mm.
- Color
- Black with broad yellow or orange bands.
- Behavior
- Bumblebees are social but form smaller colonies than honey bees. They can appear aggressive but are less likely to sting unless their nest is disturbed.
Why Bumblebees Matter
They are important pollinators and are generally not a concern unless their nest is in a problematic location.
Frequently Asked Questions
Found a bee swarm? Report it free and we'll connect you with a local beekeeper for bee-friendly removal.
