If you have the means ( Dragon or Quetz ) pluck it then drop into a wooden funnel. It may take some time to fall down but you want the base 1x1. However the person who plucked it can't tame it ( aggroed ). All you need then is ghillie suit and you can feed it through the wall.
Best method I was told. Build a 2x2 stone [or wood if low] foundation with 2 high walls, drop in with flyer, feed through wall. Has a massive hitbox to feed it through if lured close to a wall. No repel needed with this method.