The scientific study of insects is called entomology. A person who studies insects is an entomologist, and the field includes their identification, biology, behavior, evolution, and relationships with people and the environment.
What entomology means
Entomology is a branch of zoology, the study of animals, concerned with insects. Its scope is broader than collecting or naming bugs: entomologists investigate how insects develop, find food, reproduce, communicate, interact with other organisms, and respond to changing environments. The term is standard scientific English, not slang or an informal substitute.
In everyday conversation, people sometimes use “bug” for any small creature they find crawling or flying. In technical biology, however, “bug” can mean a narrower group of insects called true bugs, while spiders, ticks, centipedes, and millipedes are not insects. Entomology focuses on insects, although researchers may study them alongside other organisms when that helps answer a scientific question.
Origin of the word
“Entomology” comes through modern scientific usage from Greek roots associated with insects and study. The first element is related to Greek entomon, meaning an insect; it refers to an animal whose body is divided into sections. The ending, -logy, comes from a Greek word for study or discourse. “Entomologist” is formed from entomology with the suffix -ist, meaning a person who practices or specializes in a field.
The word is used in ordinary sentences as well as academic writing. For example: “She studied entomology at university and now surveys native pollinators.” In that sentence, the word names a field of study, not a particular insect or a method of collecting specimens.
What counts as an insect?
Insects belong to the animal class Insecta. A typical adult insect has a body organized into a head, thorax, and abdomen; six legs attached to the thorax; and a pair of antennae. Many have wings, but some adult insects do not, and immature stages can look very different from adults. These features help distinguish insects from other arthropods, the larger group that also includes spiders and crustaceans.
Butterflies, beetles, flies, bees, ants, and grasshoppers are familiar examples of insects. A spider is not an insect: it has eight legs and belongs to a different class of arthropods. Nor is every creature called a “worm” an insect. The everyday names people use can be helpful starting points, but classification depends on biological characteristics.
Insects are extremely diverse, so entomologists often specialize in a particular group or question. A researcher might focus on beetle classification, the behavior of social insects, insect fossils, or the way crop pests affect plants. Specialization does not change the broad field name: each of these areas falls within entomology.
What entomologists study
Entomology combines observation, classification, experiments, fieldwork, and laboratory analysis. The methods depend on the question. A taxonomist may compare physical traits to determine whether specimens belong to a known species, while a behavioral researcher may observe how insects respond to food or signals. An ecologist may examine how insect populations relate to plants, predators, or habitat conditions.
- Classification and evolution: identifying species, describing their features, and studying how insect groups are related.
- Structure and development: examining anatomy and life stages, including changes between immature and adult forms.
- Behavior and ecology: studying feeding, movement, communication, pollination, and interactions in ecosystems.
- Applied entomology: investigating insects relevant to agriculture, forestry, public health, conservation, or stored materials.
These areas overlap. For example, understanding an insect that feeds on a crop may require identifying it correctly, learning its life cycle, and studying the conditions that help its population grow. Entomological findings can inform management or conservation, but the appropriate response depends on the species and local circumstances.
How the field is used in practice
Entomology has both basic and applied branches. Basic research asks how insects work and how their diversity developed. Applied research uses knowledge of insects to address practical questions, such as crop damage, the conservation of pollinators, or insects that can affect human or animal health. These are examples of research areas, not claims that every insect is harmful or that one solution applies everywhere.
In agriculture, insect researchers may distinguish a crop pest from a beneficial insect and examine the conditions behind an outbreak. In conservation, they may document which insects occur in a habitat and what resources those species need. In forensic entomology, specialists study insects associated with remains to help answer questions in investigations; this work requires careful methods and should not be confused with casual insect identification.
Insects also perform important ecological roles. Some pollinate plants, many are food for other animals, and others help break down organic material. The importance of a species varies by ecosystem. Entomology helps describe these relationships rather than treating insects as a single category of useful or troublesome creatures.
Entomology compared with related fields
Entomology overlaps with several scientific subjects, but their central questions differ. Zoology covers animals broadly, whereas entomology concentrates on insects. Ecology examines relationships between organisms and their surroundings; an ecologist may study insects as part of a wider ecosystem without specializing in them. Taxonomy is the science of naming and classifying organisms, and an entomologist may use taxonomic methods as one part of insect research.
Arthropodology is a broader term for the study of arthropods, which include insects as well as spiders, mites, centipedes, and crustaceans. It is not a more precise synonym for entomology. If a course, job, or research project concerns insects specifically, “entomology” is the usual field name. If it covers several arthropod groups, the broader term may fit better.
In a college setting, an entomology course may be offered within a department focused on biology, agriculture, ecology, or another related area. The department name and course content vary by institution. Students should check the official course description and program requirements to see whether a class emphasizes identification, ecology, agriculture, or another specialty.
Common misunderstandings
A frequent misconception is that entomology means only collecting insects. Specimen collection can support identification and research, but the field also includes observation, experiments, data analysis, and work with preserved specimens or existing records. Some entomologists rarely collect insects themselves, depending on their research role.
Another mistake is to call any small arthropod an insect. A tick or spider may be discussed by someone working in an insect-related setting, but neither is an insect in biological classification. Conversely, winglessness does not automatically rule out an animal as an insect. To identify an unfamiliar animal, look at its observable features and consult a reliable identification resource rather than relying only on size or the word “bug.”
Finally, entomology is not limited to pest control. Managing pests is one application, but the discipline also studies insect diversity, evolution, behavior, ecology, and conservation. Many insects have no direct connection to human problems, and many have roles in natural systems that research seeks to understand.
Frequently Asked Questions
What is the scientific name for the study of insects?
It is entomology. The word names the scientific field concerned with insects and their biology, classification, behavior, and interactions.
What is a person who studies insects called?
A person who specializes in the study of insects is an entomologist. The term applies to researchers and other professionals whose work focuses on insects.
Is entomology a real scientific field?
Yes. Entomology is an established branch of zoology, with research that ranges from insect classification and evolution to ecology and practical applications.
Are spiders studied in entomology?
Spiders are not insects, so their study is not entomology in the strict sense. They may be considered in broader arthropod research or in projects comparing insects with other arthropods.
What is the difference between entomology and zoology?
Zoology is the broad study of animals. Entomology is the specialized study of insects, so it is one area within the wider study of animal life.
In short
The study of insects is called entomology, and a specialist in the field is an entomologist. The term is standard scientific vocabulary, and it covers much more than insect identification: it includes research into insect structure, development, behavior, evolution, ecology, and practical significance. Remembering that insects are a specific animal group also helps distinguish entomology from the broader study of arthropods.