Fig. 4. A: Caicos pine recovery project (Turks and Caicos Islands). 3 different sensors (a) visible: red, green and blue. (b) Red edge camera: green, blue and red edge. (c) NIR camera:green, red and near infra-red.B: Caicos pine recovery project (Turks and Caicos Islands). Red edge imagery of infected pine forest. Health pine trees show up as light orange (with a feathered texture). Insert showsclose up of pine trees, where the shadow has a distinctive pine outline. A first assessment of the forest condition and plant health was carried out using UAV derived images, measuring thecurrent extent of the scale damage. (For interpretation of the references to colour in this figure, the reader is referred to the web version of this article.)