The "owl" shaped panels on the bird scarer or "Gull Sweeper" broke after a long time in the weather. This is a replacement and works as the original did.
POST PRINT UPDATE: For those who might have been concerned about strength or durability, we've had a few 100km/hr + winds whip through here since I installed these on my boat and there's been no damage or deteriation at all. :-)
Printed in ABS. I used a raft for one but not the other. It didn't seem to make a difference.
Left it in an acetone vapour bath for about an hour to get that nice shiny look.
Was designed on Fusion 360. I drew the outline of the old ones, pieced together, on a bit of paper and then did all the measurements