One scheme that sometimes works for the spreader squatters; rig a bit of small (maybe 8 lb test) monofilament fishing
line taughtly between mast
, about 1- 1 1/2 inches above the spreader. This seems to interfere with their sense of security
, or maybe gets in the way w hen landing... dunno... but it does sometimes work
All the visual deterrents, like flags
or CDs strung around, fail to discourage them. A small boy with a BB gun would work, but seems to be illegal in Oz !