There are several bands named "Leeches":
1) Leeches (New Zealand, Punk/Hardcore): Formed in March 2010 when members of now defunct "Bleeders" Angelo and Ian returned home from Canada. Wanting to do something new musically, but still something a little familiar they returned to their roots with a vision of the melodic punk/hardcore crossover that had been so successful in their past. They recruited Sam Crocker (Antagonist A.D), Little Dan (Brick vs. Face, Die Alone) and Jaden (Goodnight Nurse) to complete the line-up.
2) Leeches (United Kingdom, Pop/Alt-Rock): Formed in 2016.
3) Leeches (U.S.A., Noise): Active 2004-2011. Alias for Daniel Dlugosielski, founder and head honcho of the defunct noise label Excite Bike.