Isodontia mexicana

Isodontia mexicana, the grass-carrying wasp, is a species belonging to the family Sphecidae. It is mainly found throughout North America, but has become established in Europe, primarily France, Switzerland, Hungary, Italy, Serbia and Spain.

Isodontia mexicana
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Hexapoda
Class:	Insecta
Order:	Hymenoptera
Family:	Sphecidae
Subfamily:	Sphecinae
Tribe:	Sphecini
Genus:	Isodontia
Species:	I. mexicana
Binomial name
Isodontia mexicana (Saussure, 1867)

The adults grow up to 18–20 millimetres (0.71–0.79 in) long, the body is completely black, the thorax is quite hairy and the wings have a smoky-brown color. They can be encountered from early Summer through September. Females are larger and emerge as adults later in the season than males.

Isodontia mexicana is a typical case of a species arrived accidentally from North America and slowly encroaching on the European continent, probably for the lack of predators or parasites.

These wasps build their nests in hollowed branches or in other natural cavities, often reusing the nests of other species. Then they line the inside with grass fragments or other plant fibers (hence the name of 'Grass-carrying wasps').

I. mexicana mainly preys on grasshoppers (usually katydids, Tettigoniidae species) or Tree crickets (Gryllidae species), choosing the small ones and carrying them to its nest to feed the emerging larvae with the living, but paralyzed Orthoptera.

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  Lateral view
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  Prey
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  In flight carrying nesting material
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  Nest closure