What Is Entomology?
Entomology is the scientific study of insects — the most diverse and abundant group of animals on Earth. Derived from the Greek entomon (insect, literally "cut into," referring to the segmented body) and logos (study), entomology encompasses the taxonomy, anatomy, physiology, behaviour, ecology, and evolutionary biology of the class Insecta and related arthropods.
A Brief History
Humans have studied insects for millennia, driven initially by the practical needs of agriculture, beekeeping, and silk production. However, entomology as a formal discipline emerged during the scientific revolution:
- Aristotle (384–322 BC): Made some of the earliest systematic observations of insect anatomy and life cycles in his Historia Animalium.
- Jan Swammerdam (1637–1680): Dutch naturalist who produced detailed anatomical studies of insects, including the first description of insect metamorphosis.
- Maria Sibylla Merian (1647–1717): Groundbreaking artist-naturalist who documented the life cycles of Surinamese insects with exquisite illustrations.
- Carl Linnaeus (1707–1778): Established the binomial naming system still used to classify insects today.
- Jean-Henri Fabre (1823–1915): French entomologist celebrated for his detailed behavioural studies, published as the ten-volume Souvenirs entomologiques.
- E.O. Wilson (1929–2021): Pioneering myrmecologist (ant specialist) whose work on sociobiology and biodiversity conservation transformed our understanding of insect societies.
Why Study Insects?
- Insects comprise over 80% of all known animal species.
- They provide essential ecosystem services worth billions of pounds annually: pollination, decomposition, pest control, and soil formation.
- Insects are vital food sources for birds, fish, amphibians, reptiles, and mammals.
- Understanding insects is critical for agriculture, medicine, forensics, and conservation.
- Insect declines threaten entire ecosystems, making entomological research more urgent than ever.
Major Branches of Entomology
| Branch | Focus | Applications |
|---|---|---|
| Systematic entomology | Classification and naming of insect species | Biodiversity surveys, museum collections |
| Medical entomology | Insects that transmit human diseases | Malaria control, Zika, dengue, Lyme disease |
| Agricultural entomology | Insect pests and beneficial species in farming | Integrated pest management, biological control |
| Forensic entomology | Using insects to determine time and circumstances of death | Criminal investigations, legal cases |
| Conservation entomology | Protecting threatened insect species and habitats | Red lists, habitat restoration, policy |
| Behavioural entomology | Insect behaviour, communication, and social organisation | Understanding pollination, pest behaviour |
| Molecular entomology | Genetics, genomics, and molecular biology of insects | Insecticide resistance, gene drives, phylogenetics |
Forensic Entomology
One of the most publicly visible branches, forensic entomology uses knowledge of insect succession on corpses to estimate the post-mortem interval (PMI) — the time since death. Different insect species colonise a body in a predictable sequence, and the developmental stage of blowfly larvae (maggots) found on a body can indicate, with surprising precision, how long the body has been exposed.
Did you know? The earliest recorded use of forensic entomology dates to 13th-century China. In 1247, the Chinese lawyer and death investigator Song Ci described a murder case in which the victim's identity was established by observing which sickle attracted blowflies when all the village's sickles were laid out in the sun — the flies were attracted to invisible traces of blood on the murder weapon.
Careers in Entomology
Entomology offers diverse career paths, including:
Career Pathways in Entomology
- Academic research: University positions studying insect ecology, evolution, genetics, or behaviour.
- Museum curation: Managing and expanding insect collections; taxonomic research.
- Agricultural advisory: Working with farmers on pest management strategies (e.g. ADAS, crop consultancies).
- Conservation: Surveying and protecting threatened insect species for organisations like Buglife, Butterfly Conservation, or Natural England.
- Medical/veterinary entomology: Researching and controlling disease-transmitting insects (e.g. WHO, Public Health England).
- Pest control industry: Developing and implementing insect management solutions in commercial and domestic settings.
- Science communication: Writing, broadcasting, and educating the public about insects.
Getting Started
Anyone can begin exploring entomology. In the UK, organisations such as the Royal Entomological Society, Buglife, Butterfly Conservation, and the British Entomological and Natural History Society welcome amateur members and offer field meetings, identification courses, and recording schemes. Many significant entomological discoveries have been made by amateur naturalists.
Key Takeaway
Entomology is a vast and vital science that underpins our understanding of ecosystems, agriculture, medicine, and conservation. With insects facing unprecedented declines worldwide, the need for skilled entomologists — both professional and amateur — has never been greater. Whether through academic research, practical pest management, or citizen science, there are countless ways to contribute to this essential field.