Midrash for Chullin 278:55
א"ר אשי אמר לי [ר'] חנינא
applies both to clean and unclean birds, but as for the term 'zippor', we find clean birds referred to as zippor but not unclean birds.
Sifrei Devarim
(Devarim 22:6) "If there chance before you a bird's nest": to exclude what is normally found there.
Ask RabbiBookmarkShareCopy