--- title: "Fruit Fly (Drosophila melanogaster) | AnimalTracks.wiki" description: "A 3-millimetre fly that lives on rotting fruit and has been central to major breakthroughs in genetics." image: "https://animaltracks.wiki/images/animals/fruit-fly-1.webp" published: "2026-10-11" updated: "2026-10-11" --- # Fruit Fly (*Drosophila melanogaster*) > **Status**: Checked against 4 sources, listed under Sources below. > **Tagline**: A 3-millimetre fly that lives on rotting fruit and has been central to major breakthroughs in genetics. > **Soundtrack Vibe**: Big Beat & 90s Acid Techno // Daft Punk, "Around the World" > **Soundtrack Links**: [Spotify](https://open.spotify.com/track/1pKYYY0dkg23sQQXi0Q5zN) > **Vibe Match**: Labs have used this fly since the early 1900s, and its short generation time was probably part of the appeal. Daft Punk's Around the World repeats one short phrase again and again while the parts around it shift. ## Biological Superpowers & Stats - **Taxonomy**: *Drosophila melanogaster* - **Danger Level**: Low - **Conservation Status**: Not Evaluated ([IUCN Red List](https://www.iucnredlist.org/)) - **Superpower**: Has counterparts to an estimated 65% of human disease genes - **Habitat**: Worldwide, around rotting fruit and other decaying plant matter - **Diet**: Rotting fruit and other decaying plants, plus some of the microbes in them - **Tags**: insect, flying ## Natural History & Behavior ## A tiny fly, a huge reputation The fruit fly *Drosophila melanogaster* is about 3 mm long and 2 mm wide. The female is slightly larger than the male. It is normally yellow-brown, with large red compound eyes (eyes built from many tiny lenses) and black stripes on its abdomen. Like other flies, it has a single pair of wings. Where a second pair would sit, it has knobby balancing organs called halteres. In one lab study, females of a lab-adapted strain had a median lifespan of 69 days on whichever of five diets kept them alive longest. Few studies have been done in the wild, but those that have show wild flies tend to be larger than lab-reared ones. ## From Africa to everywhere The species appears to have originated in sub-Saharan Africa. It is thought to have spread to Europe and Asia 10,000 to 15,000 years ago, and its range is now worldwide. It is a human commensal, a fly that lives alongside people, mostly around rotting fruit. Females lay their eggs in necrotic material, meaning dead and rotting matter, and the larvae (the maggot stage) develop and pupate there. Two life stages are completely immobile: the egg and the pupa. In the wild, larvae and flies are exposed to predators such as ants, beetles, pseudoscorpions and lizards. Some of the microbes in its rotting food are food for the fly, and larvae or adults eat them selectively. Of the fly species that share a rotting fruit, its close relative *Drosophila simulans* arrives first, then *D. melanogaster*. That order is consistent with *D. melanogaster* tolerating more ethanol (alcohol) than *D. simulans* does. ## A lab celebrity > **Nobel history** From its first use in the laboratory in the early 1900s until now, this fly has been central to major breakthroughs in genetics. Thomas Hunt Morgan won the 1933 Nobel Prize in Physiology or Medicine for discoveries about the role of the chromosome in heredity. Morgan's former student Herman J Muller later won the prize in 1946 for discovering that X-rays cause mutations. The first full read of the fly's genome, published in 2000, counted approximately 13,600 genes. The fly has played an increasingly important role in creating animal models of human disease. Approximately 65% of human disease genes are estimated to have counterparts in it. ## Frequently Asked Questions ### Where did fruit flies come from? Probably sub-Saharan Africa, according to an eLife review. Its first move out of Africa is thought to have taken it to Europe and Asia, and North America and Australia were colonized more recently. *(Source: [Markow 2015]())* ### How is a lab fruit fly's life different from a wild one's? In the lab, flies tend to be reared at a constant temperature and humidity, and the fungal, bacterial and viral pathogens they meet in nature are absent. In the wild, those conditions fluctuate, and the flies also face parasites such as wasps and phoretic mites. *(Source: [Markow 2015]())* ### Why do scientists use fruit flies? An eLife review calls the species an ecological generalist, and says that helped it be propagated in the lab. The first person known to rear it probably also liked its short generation time and ease of rearing. *(Source: [Markow 2015]())* ## Sources 1. [Drosophila melanogaster. Animal Diversity Web, University of Michigan.]() 2. [Markow (2015). The secret lives of Drosophila flies. eLife.]() 3. [Adams et al. (2000). The Genome Sequence of Drosophila melanogaster. Science.]() 4. [Metaxakis & Partridge (2013). Dietary Restriction Extends Lifespan in Wild-Derived Populations of Drosophila melanogaster. PLoS ONE.]() *Published October 11, 2026. 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