Owlflies are dragonfly-like insects with large bulging eyes and strongly knobbed antennae. They are neuropterans in the family Ascalaphidae; they are only distantly related to the true flies, and even more distant from the dragonflies and damselflies. They are diurnal or crepuscular predators of other flying insects, and are typically 5 cm (2.0 in) long. Owlflies are readily distinguished from dragonflies because the latter have short bristle-like antennae. The closely related antlions (family Myrmeleontidae) have short, weakly clubbed antennae, smaller eyes, and very different wing venation. All but one species of Ascalaphidae have long antennae, easily distinguishing them; the sole exception is the Brazilian Albardia furcata, the only living member of the subfamily Albardiinae, which has short antennae, but the club is very strong (compared to myrmeleontids) and its typical reticulate ascalaphid wing venation demonstrates its actual relationships.