Eurasian eagle owls are likely the largest species of owl in the world. Great grey owls are slightly longer in the body, and Blakiston’s fish owls are very close in weight, but only the Eurasian eagle owl boasts a six-and- a-half foot wingspan. These owls have bright orange eyes, which indicates that they are crepuscular, or active at dawn and dusk. These owls are closely related to our native great horned owls, exhibiting the same feather tufts on the top of their heads. Sometimes people think those tufts are ears, but in fact an owl’s ears are holes on the sides of their heads that are asymmetrically placed. This, along with concave nature of the owl’s face, allows it to pinpoint exactly where a sound is coming from. There are a few owls that lie outside of these trends, however, an owl’s eye color can indicate when it hunts. Owls with yellow or orange eyes, like the eagle owl tend to be crepuscular, which means they do most of their hunting at dawn and dusk. Another fun fact about Eurasian eagle owls is that they each have unique individual vocalizations. Every member of a Eurasian eagle owl population can be identified by voice alone.