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.

As with most of the owls, there is no complete agreement among the versions. It would appear at first that “screech owl” has strong support as the translation of yanshuf. However, this is misleading. The next Hebrew name on the list of unclean birds in Leviticus 11:18 and Deuteronomy 13:16 is tinshemeth, which New International Version renders “white owl” and New American Bible “barn owl”. In fact both white owl and barn owl are simply alternate names for the screech owl, which these two versions have included earlier in the list. They have thus actually listed the same owl twice. Among Jewish scholars the translation of tinshemet as barn owl has a long history, and in modern Hebrew this is the name of the barn owl. Thus it seems best to translate yanshuf in some other way.

There are two likely candidates. For translators who have translated the word tachmas earlier in the list as “eared owl”, yanshuf can be translated as “tawny owl”. For those who decided to follow modern Hebrew usage and translate tachmas as “nightjar”, it would be good to translate yanshuf as “eared owl”, which also follows modern Hebrew usage.

The Tawny Owl Strix aluco is a fairly rare bird in Israel, but where it is present, its call is unmistakable. The male calls with a series of hoots “HOO-hoo-hoo, hoo-HOO-hoo”, and the female replies with a higher pitched single hoot “HOO”. Its eyes are outlined with pale circles, so that it looks as though it is wearing spectacles. As its name indicates, it is a mottled gray-brown color. It prefers wooded areas or orchards and roosts close to the trunk of a tree.

It is listed as an unclean bird.

Owls very similar to the tawny owl, which belongs to the same family as Wood Owls Strigidae, are found in many places in the world. In sub-Saharan Africa the Wood Owl Strix woodfordii is very similar to the tawny owl, while in Australasia the Boobook Owl Ninox novaseelandiae is a good equivalent. Elsewhere the word for a medium-sized wood owl, or a phrase meaning “tawny-colored owl” can be used.

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