Heat map of speargrass weevil browse sign on Mana Island in February 2021. Brighter colours show areas with high densities of speargrass weevil browsing sign, with black showing low density of browse sign (areas outside the black areas had no browse sign detected). Red star = speargrass weevil release site, yellow stars = sites where adult speargrass weevils were found in February 2021. Red hatched areas (lower slopes) had low speargrass densities and were not surveyed. Image reproduced from Miskelly and Hamilton (2022).