Hamsasana or Swan Pose
Swan pose is similar to Peacock pose (Mayurasana)
except that the fingers point forward.
Yoga 101 - Eka Hasta Bhujasana
Eka Hasta Bhujasana or Elephant's Trunk as this pose is sometimes known requires hip and hamstring flexibility, as well as core strength.
Yoga 101 - Parsva Kakasana
Parsva Kakasana (side crow pose) is sometimes referred to as Parsva Bakasana (side crane pose).
This particular pose requires substantial hip flexibility, core strength and, of course, balances.