Syrphus ribesii, commonly known as the hoverfly or marmalade hoverfly, is a species of insect belonging to the family Syrphidae. It is a small to medium-sized fly, typically measuring around 10-12 mm in length. The adult hoverflies are characterized by their yellow and black striped abdomen, resembling a wasp, while the larvae are greenish and slug-like in appearance. They are important pollinators and are often found in gardens and meadows, feeding on nectar and pollen.