, and (ib. 102b) under 
, explained by Rashi as "a very lean bird." Some would connect these words with the Latin "prava" (bad) and the Greek κηλόν (meager, dry), and see in these birds species of the sea-mew.For Biblical data see CUCKOO. In the Talmud (Ḥul. 62b) is mentioned an unclean bird under the name , and (ib. 102b) under , explained by Rashi as "a very lean bird." Some would connect these words with the Latin "prava" (bad) and the Greek κηλόν (meager, dry), and see in these birds species of the sea-mew.