Efferia bryanti
Wilcox, 1966
Madera Canyon Hammertail
Efferia bryanti is a of in the , described by Wilcox in 1966. It is commonly known as the Madera Canyon Hammertail. The species belongs to the large and diverse Efferia, which contains numerous North robber fly species. As with other Efferia species, E. bryanti is a predatory that likely hunts other .

Pronunciation
How to pronounce Efferia bryanti: //ɛˈfɛ.ri.ə ˈbraɪ.æn.taɪ//
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Distribution
The "Madera Canyon Hammertail" suggests an association with Madera Canyon, located in the Santa Rita Mountains of southeastern Arizona. The is presumably found in this region and potentially other areas of the southwestern United States, though specific distribution records are limited.