Owls are found worldwide except in the Antarctic and on some islands. They are active at night and are characterized by flat faces and short hooked beaks that they can open very wide. They swallow their prey whole and later regurgitate the undigested parts as small balls. They also have the ability to turn their heads more than 180 degrees.

There are two basic owl families, both of which are found in the land of Israel. One family is the Tytonidae, which are the Barn and Grass Owls. They have heart-shaped whitish faces, usually outlined by a dark line, and small dark eyes. The other family is the Strigidae, the typical owls. This family contains a large variety of species, all of which have large eyes that may vary in color from light brown through orange to yellow. This family includes the eared or horned owls, the fairly rare fishing owls, and owls that vary in size from the midget scops owl (less than 20 centimeters [8 inches]) through to the giant eagle owl (over 70 centimeters [28 inches]).

Eight species of owl are fairly common in the land of Israel. Most are very seldom seen by humans, but they are quite well known by their different and distinct calls. In biblical times the nights would have been much quieter than in most modern places, and the strange night sounds probably would have interested people, causing some speculation about what was making the sound. The different owls would thus probably have had different names even if people had never seen them. In fact it is unlikely that they would have been able to associate most of the calls with the owls that were seen.

Some scholars have linked bath ya‘anah with the word ya‘en, which is the ostrich. In view of the contexts in which the word occurs, however, it does not seem that this is a likely interpretation. In the biblical contexts it can be seen that the bath ya‘anah is linked with jackals, deserted ruins, and wailing sounds. It also seems to be reliant on water (compare Isaiah 43:20). None of these are contexts into which the ostrich would fit easily. Furthermore, while it is easy to see the reason why certain birds are listed as unclean, from their diet or association with foreign deities, it is not easy to see why ostriches would be included in the list. They are basically vegetarian, like domestic fowls. The only possible reason would be that since they cannot fly, they were considered somehow “unnatural,” as was the bat.

Other scholars have derived the name from an Arabic word meaning “desert,” and still others from an Aramaic word meaning “greedy.” Hasting’s Dictionary of the Bible suggests that it refers to the eagle owl, and from its position in the list of unclean birds this seems a distinct possibility. The “desert-owl” of New English Bible and Revised English Bible is not a distinct species but a general word for owls that live away from towns.

Eagle owls are the giants in the owl family. The European Eagle Owl Bubo bubo is the largest owl in the Middle East, standing over 75 centimeters (30 inches) tall. The corresponding owl in the land of Israel is a pale fawn color, spotted, has ear tufts, and is best known by its loud, deep hooting at night. It roosts by day in deep shade in acacia trees, caves, tombs, and ruined buildings. It feeds on small mammals, including hares, baby gazelles, lambs, rats and mice, and large roosting birds, especially wild and domestic ducks. It is sometimes seen when it is roosting during the day, or when disturbed in a cave or old tomb, but it is seldom seen at night, except in modern times when it is sometimes seen on roads late at night.

In the Bible this owl is associated with death, mourning, and ruin, as well as being listed as an unclean bird.

Eagle owls of one species or another are found in southern and eastern Europe and throughout Africa and South and Southeast Asia. Large owls of a slightly different kind are found in Australasia. The two most common African eagle owls are the Spotted Eagle Owl Bubo africanus and the Giant Eagle Owl Bubo lacteus (known as Verreaux’s eagle owl in East Africa). The Asian Eagle Owl Bubo indicus is found in hilly wooded or forested country away from towns. The largest Australian owl is the Great Scrub Owl Ninox strenua. A word for any of these owls, or a phrase meaning “giant owl”, would be a close local equivalent to use in the lists of unclean birds. In other contexts, a phrase such as “large owls” would be sufficient.

Source: All Creatures Great and Small: Living things in the Bible (UBS Helps for Translators)