Perched on top of a mountain in Lower Galilee was the city of Tzipori, a great center of Jewish life in Talmudic times.
Many Talmudic Sages lived in Tzipori, among them Rabbi Yossi who maintained his rabbinical court there. When he passed away blood flowed in the pipes of Tzipori as a Heavenly sign of mourning.
The gemara (Mesechta Megillah 18a) states that this city was called Tzipori because it was located atop a mountain like a tzipor (bird).