Of the local farmers interviewed from the Trapping area, about half considered that parrot numbers had declined while the others felt that parrot numbers were similar or more abundant than before the trial. The variability in parrot abundance and parrot damage, whether between sites, between regions or from year to year, made it difficult to identify and measure an effect of trapping. It was concluded that trapping within the 160,000 ha area over a two year period did not produce a clear regional effect. However, in some cases the removal of high numbers of parrots from near particular monitoring sites resulted in temporary control of parrot numbers and damage at a local level. The parrots are not attracted to the dry grain in traps at these times of year.
Parrots appear able to move from adjacent areas into areas where parrots have been removed.
It is possible that even where parrot populations have been reduced, concentrations of them may still cause extensive damage. Improving effectiveness of trapping Observation and experience from the trapping trial suggest a number of ways to improve the effectiveness of a trapping program. Different baits may be required to lure the parrots into traps in summer. Water in the trap has been tried with some success. If summer trapping numbers are poor, supplement with intensive shooting.