Airport respondents were asked to identify which listed animal
control countermeasures had ever been implemented at their
airport. Both passive and active CM techniques were employed by
the 35 responding airports (Table 1). The most frequently used CMs
were: special mowing regimes to keep grass length over 15 cm
high; noise harassment to disperse birds; sharp shooting to remove
pest animals or birds; and removal of diverse habitat to discourage
animal use. CMs least employed were erecting electric fencing,
falconry, and placing grates over streams or ponds.
Those surveyed were asked to rank the outcomes of CM treatments
employed at their airports (Table 2). CMs where 100% of
users ranked the outcome as successful or very successful were the
use of dogs and influencing water management with 8 km of the
airport, which had been employed by 5 and 2 respondents,
to reduce nesting or reduce rodent populations. One small and 2
regional airports only cut their grass once per year.