''Ammophila aberti'' is a species of

thread-waisted wasp The Sphecidae are a Cosmopolitan distribution, cosmopolitan family of wasps of the suborder Apocrita that includes Ammophilinae, sand wasps, mud daubers, and other thread-waisted wasps. The name Sphecidae was formerly given to a much larger g ...

in the family

Sphecidae The Sphecidae are a Cosmopolitan distribution, cosmopolitan family of wasps of the suborder Apocrita that includes Ammophilinae, sand wasps, mud daubers, and other thread-waisted wasps. The name Sphecidae was formerly given to a much larger g ...

Distribution

It is found in western and central North America, from southern Canada to Mexico, in open,

semi-arid A semi-arid climate, semi-desert climate, or steppe climate is a aridity, dry climate sub-type. It is located on regions that receive precipitation below Evapotranspiration#Potential evapotranspiration, potential evapotranspiration, but not as l ...

locations.

Mating

The male rides on the female's back, using his

mandibles In jawed vertebrates, the mandible (from the Latin ''mandibula'', 'for chewing'), lower jaw, or jawbone is a bone that makes up the lowerand typically more mobilecomponent of the mouth (the upper jaw being known as the maxilla). The jawbone i ...

to hold onto the back of her head. The female must move her abdomen upwards for them to copulate successfully.

Nesting

The female of this species digs its nest in firm sand or muddy areas. While digging, the wasp emits a buzz that can be heard from over four meters away. It flies the soil it excavates away from the burrow. Tunnels are several centimeters long, usually straight, sometimes slightly curved or angled. The round cell at the bottom of the tunnel is 18-20mm in diameter. ''Ammophila aberti'' prey on

geometrid The geometer moths are moths belonging to the family Geometridae of the insect order Lepidoptera, the moths and butterflies. Their scientific name derives from the Ancient Greek (derivative form of or "the earth"), and "measure" in referen ...

larvae, providing up to 10 for a nest. Gathering enough prey for their larvae takes over two days. During this time it will temporarily close the entrance, open it to deposit prey, and then close it again. This temporary closure is achieved by pulling a pebble over the opening and pushing sand over it. After the nest has been fully provisioned, the wasp will close the burrow again by jamming pebbles inside it and kicking the dirt or sand down. Sometimes it will only use dirt or sand. Once the fill material has reached the surface, it will use a rock or some other hard material to press down the dirt.

References

Sphecidae Articles created by Qbugbot Insects described in 1852 {{apoidea-stub