In Greek mythology, Itys was the son of Procne and Tereus. Tereus loved his wife's sister, Philomela. He raped her, cut her tongue out and held her captive so she could never tell anyone. Philomela wove a tapestry that told her story and gave it to Procne. In revenge, Procne killed her son by Tereus, Itys, and fed him to Tereus unknowingly. Tereus tried to kill the sisters but all three were changed by the Olympic Gods into birds: Tereus was a hoopoe; Philomela was a swallow; Procne was a nightingale whose song is a song of mourning for her son Itys.
The names "Philomela" and "Procne" are sometimes used in literature to refer to a nightingale, though only the latter is mythologically correct.
ITIS aims to produce a complete and accessible database of taxonomic information for every recognised species and other taxon, including both its place in the hierarchical system of
Biological taxonomy is not fixed, and opinions about the correct status of taxa at all levels, and their correct placement, are constantly revised as a result of new research, and many aspects of classification will always remain a matter of judgement.
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