Weekly catch per unit effort (CPUE) of brown treesnakes along transects A without and with traps with mouse lures and B without scent, with fresh scent (applied that day), or with old scent (applied the day before). A Overall, average CPUE of snakes was 32% higher along transects with mouse lures than transects without such lures. Vertical lines group traps deployed at similar locations (Week 1 and 8, Week 2–4 and 9, and Weeks 5–7 denote same trap locations). B Overall, average CPUE of snakes was 45% and 12% higher along transects that were not sprayed as compared to those with fresh scent and old scent respectively. Asterisks indicate that no spraying occurred in week 4.