Black and yellow mud dauber vs Great golden digger wasp
These two are easy to mix up. Here's how to tell a black and yellow mud dauber from a great golden digger wasp, and whether either one bites or stings.
Black and yellow mud dauber
Sceliphron caementarium
Great golden digger wasp
Sphex ichneumoneus
≠The key differences
Similar thread-waisted shape, but black with yellow markings and yellow legs rather than orange and black; builds visible mud nests on walls instead of digging burrows.
⚖︎Side by side
| Black and yellow mud dauber | Great golden digger wasp | |
|---|---|---|
| To humans | Mild sting | Painful sting |
| Size | About 20-28 mm body length | 15-25 mm body length |
| Colours | Black, Yellow, Brown (wings) | Orange, Black, Dark brown (wings/translucent) |
| Family | Sphecidae | Sphecidae |
| Habitat | Human structures, cliffs, rock overhangs, tree trunks, sheltered outdoor surfaces in urban, suburban and rural areas | Open, sunny areas with patches of bare or sandy soil: fields, road edges, sand dunes, lawns, gardens and gravelly banks. |
| Range | Native to North and Central America (from southern Canada through the United States and Mexico); introduced to parts of Europe, Pacific islands and other regions | Widespread in eastern and central North America; also reported across much of the continent where suitable habitat exists. |
| Active | Warm months (spring through early fall); diurnal (active during daylight) | Late spring through summer (regional peak varies). Active during daylight, especially warm sunny hours. |
| Pest? | No | No |
🔍How to spot a black and yellow mud dauber
- Slender, thread-waisted body with a narrow petiole between thorax and abdomen
- Black body with yellow markings, a long yellow thread-like waist and largely yellow legs
- Mud tubular nests made of smooth, cylindrical cells attached to sheltered vertical surfaces
- Solitary behaviour—no paper-comb nests or large colonies like social wasps
🔍How to spot a great golden digger wasp
- Large orange and black wasp with a narrow, thread-like waist and long legs.
- Bright orange thorax and anterior abdomen contrasted with a darker posterior abdomen and legs.
- Solitary behaviour: females digging burrows in bare sandy soil and carrying crickets or katydids.
- Visit to open flowers for nectar during warm daylight hours.
?Frequently asked questions
What is the difference between a black and yellow mud dauber and a great golden digger wasp?
Similar thread-waisted shape, but black with yellow markings and yellow legs rather than orange and black; builds visible mud nests on walls instead of digging burrows.
Is a black and yellow mud dauber or a great golden digger wasp more dangerous?
Black and yellow mud dauber: Mild sting. Great golden digger wasp: Painful sting. Females can sting but are not aggressive; stings are typically mild and brief. Females can sting if handled, trapped against skin, or accidentally pinched.
Identification from photos is never certain: don't handle insects you can't identify, and get medical advice for bites, stings or allergic reactions.