There are various bands and musicians called Hydra.
These are photos from concerts where Hydra played, so they may be of other bands that played the concert as well.
Aerosmith / Les Variations / Hydra Sep 10, 1975 Buffalo, New York, United States Uploaded by Suraci
Grand Funk Railroad / Hydra Feb 13, 1975 Hampton, Virginia, United States Uploaded by Zimtrim
