Bari

These larger versions of the Biri (that look very much like a Metroid) are very easy really, their only attack is to sit in one place and spin around. The only catch is they usually appear by falling from the ceiling. A simple sword slash will hurt you, so you're better off using Deku Nuts to stun them or a quick Spin Attack. Once damaged, they will split into three Biri. In general though, it's better to just avoid them altogether.