Northeastern Hammertail

Efferia aestuans is a species of insect in the family Asilidae, the robber flies. It is native to eastern North America, where it ranges from Ontario and New Hampshire south into Florida and New Mexico. It was originally described as Asilus aestuans in Carl Linnaeus' 1763 work Centuria Insectorum.

Efferia aestuans est un insecte diptère prédateur de la famille des Asilidae (les mouches à toison).

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