The Hebrew word is tanshemeth, and is mentioned among the unclean birds. The swan has been seen in Palestine, but it is rare, and, as it feeds on vegetation, it is supposed that some other bird is alluded to. The LXX and the Vulgate have the porphyrio and ibis. The R.V. has 'horned owl.' Leviticus 11:18; Deuteronomy 14:16 . Probably some water fowl is referred to, and the purple waterhen, of the Rallidae family, is a bird that would necessarily be condemned as unclean because of its feeding upon reptiles as well as birds: it seizes its prey by its long toes and conveys it to its mouth. It frequents the marshes bordering the Mediterranean.