It is one of the common names of an insect of the Order Odonata. It is also called mojaculos, helicopter, devil's horse, folelé, matapiojos or bailiff. They are paleoptera insects, that is, insects that cannot fold their wings on the abdomen. They have large eyes and are very important because they eat many harmful insects such as flies, mosquitoes and moths.
It is another common name of the anisoptera insect also called matapiojo, sheriff, devil's horse, mojaculo. In this case it has a Latin origin, where libellula, ae means "seesaw, small scale", for its ability to fly maintaining its position in the air, as if it were in balance like a scale of plates.