The realisation of every design begins with a full scale drawing. Below is a detail of the blackbird design, and next to the drawing is a big pile of (annealed) copper patterns ready to shape.

This is a tricky design, as the upper bird with it's wings outstretched is not facing into the wind. I have never seen or made a weathervane of a bird in flight with it's back to the wind...risky business! The ultimate reward will be if it's possible to do without reinforcing the edge of the feathers.