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Asio is a genus of typical owls, or true owls, in the family Strigidae. 

1/ Short-eared owl (Cú lửa, Asio flammeus)

The genus name Asio is from asiō, the Latin name used by Pliny the Younger for a type of horned owl, the feather tufts on the head of these owls give the appearance of "ears" which is a defining characteristic.

Short-eared owl 
(Cú lửa, Asio flammeus)

The short-eared owl (Asio flammeus) is a widespread grassland species in the family Strigidae.
The bird is found on all continents except Antarctica and Australia, and it is partially migratory.

The name Strigiformes is formed from "Strig", the plural form of the Latin word "strix", meaning "owl", and "formes", meaning "forms".

Strigidae: derived from "Strix", a Latin word for owl (also the same in Greek).

The genus name Asio is from asiō, the Latin name used by Pliny the Younger for a type of horned owl, the feather tufts on the head of these owls give the appearance of "ears" which is a defining characteristic. The possible origin is from ancient Greek οὖς (pronounced roughly as oos) is a noun meaning "ear".

Flammeus is a Latin adjective meaning "flaming," "fiery," or "fiery red," derived from the Latin word flamma (flame).