Malachite green (LMG) is used as a detection method for latent blood in forensic science. Hemoglobin catalyzes the reaction between LMG and hydrogen peroxide, converting the colorless LMG into malachite green. Therefore, the appearance of a green color indicates the presence of blood. In 1992, Canadian authorities determined that eating fish contaminated with malachite green posed a significant health risk. Malachite green was classified a Class II Health Hazard. Due to its low manufacturing cost, malachite green is still used in certain countries with less restrictive laws for non aquaculture purposes. In 2005, analysts in Hong Kong found traces of malachite green
Malachite sunbird sunbird species can take nectar by hovering like a hummingbird, but usually perch to feed most of the time. As a fairly large sunbird, the malachite sunbird is no exception. They have long thin down-curved bills and brush-tipped tubular tongues, both adaptations to nectar feeding. Some plant species from which malachite sunbirds feed include many "Aloe" species, such as "Aloe broomii", "Aloe ferox" and "Aloe arborescens", and "Protea" species, such as "Protea roupelliae" as well as various other bird-pollinated plants such as "Leonotis" and "Strelitzia". It has been suggested that their behaviour of guarding flowering plants may have led to