Spider mites reproducing. Light microscope brightfield epi-illumination footage of mass reproduction of spider mites (Tetranychus sp.) in a greenhouse on beans. The footage shows several wintering females (deep orange). This plant parasite is found on vegetable crops, fruit trees and flowers, where it feeds on the leaf sap. The spider mite is named due to its ability to spin a web, which it does across a leaf surface that secures and protects it against predators. Magnification: x50 at 10 centimetres across.