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Flytraps can be used on farms to monitor the populations of primary strike flies (<i>Lucilia cuprina</i> and <i>Lucilia sericata</i>) and, hence, offer a view regarding the incidence of flystrike on sheep. This study aimed to contrast the specificity and effectiveness of the LuciTrap with its combination of three chemical lures (Lucilures) and the Western Australian Trap with three bait types (LuciLure, Sheep liver with 30% sodium sulphide and squid). A mean model and rate model were fitted to the data. The mean model showed no difference (<i>p</i> > 0.05) in the mean weekly catch for <i>L. cuprina</i> between the Western Australian Trap with LuciLures and the Western Australian Trap baited with sheep liver with 30% sodium sulphide (<i>p</i> < 0.05). Whereas, for <i>L. sericata</i>, no difference (<i>p</i> > 0.05) was found between the Western Australian Trap with LuciLures, the Western Australian Trap baited with sheep liver with 30% sodium sulphide and the LuciTrap. The rate model illustrated that the Western Australian Trap with sheep liver with 30% sodium sulphide and LuciTrap did not differ (<i>p</i> > 0.05) for <i>L. cuprina</i> and <i>L. sericata</i>. Combined, these results indicate that New Zealand farmers can use either the LuciTrap or the Western Australian Trap with sheep liver with 30% sodium sulphide to monitor these target species.