Discussion
Traditionally kos has been translated as “little owl", and this is the meaning in modern Hebrew. The case for this translation is probably the strongest, even though not conclusive. If we accept this identification, the lists of unclean birds has a rather neat structure with this the smallest of the owls being paired with nets, the smallest of the birds of prey.
Description
The Little Owl Athene noctua is, as its name suggests, a small owl, which feeds at night mainly on insects and nestlings. It is about 25 centimeters (10 inches) in length and has a short tail. It does not have ear tufts. It nests in holes in banks or termite hills. It is often seen in the daytime, usually being chased by a group of small birds.
Special significance or symbolism
It is listed as an unclean bird.
Translation
The little owl is found in southeastern Europe, the Middle East, and northeast Africa. Elsewhere one may use the name of a small species of owl or the phrase “little owl".