
1) Legendary bird
Found on
https://www.crosswordclues.com/clue/procne

Procne (Πρόκνη) is a minor figure in Greek mythology. She was the elder daughter of a king of Athens named Pandion and the wife of King Tereus of Thrace. Her beautiful sister Philomela visited the couple and was raped by Tereus, who tore out her tongue to prevent her revealing the crime. She wove a tapestry which made it clear what had been ...
Found on
http://en.wikipedia.org/wiki/Procne

(from the article `Tereus`) in Greek legend, king of Thrace, or of Phocis, who married Procne, daughter of Pandion, king of Athens. Later Tereus seduced his wife`s sister ...
Found on
http://www.britannica.com/eb/a-z/p/117

In Greek mythology, Procne was a daughter of King Pandion and Zeuxippe. She married Tereus.
Found on
http://www.probertencyclopaedia.com/browse/D1P.HTM
No exact match found.