Map of sites where alkaloid-containing mites were collected. Site 1, Isla Escudo; site 2, Cayo Agua; site 3, Isla Popa; site 4, Cerro Brujo; site 5, Cayo Nancy; site 6, Isla Bastimentos; site 7, Isla Pastores; site 8, mainland south of Isla Pastores; site 9, Rio Sand Box; site 10, La Selva; site 11, Isais; site 12, Roja Maca; site 13, Tortuguero.