Bates T. H., Anderson V. J., Johnson R. L., Allphin L., Rooks D., Petersen S. L., A Practical Assessment of Using sUASs (Drones) to Detect and Quantify Wright Fishhook Cactus (Sclerocactus wrightiae L.D. Benson) Populations in Desert Grazinglands, Land, 2022, 11(5):655, doi: 10.3390/land11050655
A comparison of a ground census of Sclerocactus wrightiae with manual plant identification on orthophotomaps from flights at 10, 15 and 20 m. The paper reports numbers of correct and incorrect identifications, analyses the effects of cactus size and assesses practical options for monitoring small desert plants.