A taxonomist is a scientist who discovers, describes, classifies, and names organisms. The work sits at the foundation of biology: before anyone can study how a species behaves, what threatens it, or how it relates to other life forms, someone has to figure out what it is and give it a formal name. Taxonomy is one of the oldest scientific disciplines, tracing its modern roots to the classification systems developed in the eighteenth century, but the tools and methods have changed dramatically. Today’s taxonomists might spend a morning pinning beetles under a microscope and an afternoon running DNA sequences through a bioinformatics pipeline.
What Taxonomists Actually Do
The popular image of a taxonomist is someone surrounded by dusty museum jars, but that picture is incomplete. Taxonomists do spend time in natural history collections, but they also do fieldwork, molecular lab work, data management, and increasingly, computational analysis. The core task is species-level research: determining whether a specimen represents a known species or something new, then documenting the evidence either way.
For animals, the formal requirements for describing a new species are set by the International Code of Zoological Nomenclature. A valid species description needs four things: a new name in Latin or latinized form with a clear statement that it is intended as new; a designated holotype (the single physical specimen that anchors the name); a description or diagnosis that explains how the species differs from related ones; and publication in a form that makes identical copies widely available.1Zoological Journal of the Linnean Society. How to describe a new species in zoology and avoid mistakes Plants and fungi follow their own code, and bacteria follow yet another, but the general logic is similar: provide a name, a reference specimen, a diagnosis, and a publication.
For microorganisms, the description process is even more involved. A new prokaryote species description typically includes cell morphology, staining properties, colony appearance, metabolic characteristics, growth ranges for temperature and pH, chemotaxonomic data like fatty acid profiles, DNA base composition, and accession numbers for DNA sequences deposited in public databases.2Methods in Microbiology. How to Describe New Species of Prokaryotes A single species description can take months or years of lab work to assemble.
The Naming System Behind All of It
Every organism’s formal scientific name follows rules codified in international nomenclature codes. Before the mid-nineteenth century, naturalists named organisms however they liked, and the resulting chaos made it nearly impossible to tell whether two researchers in different countries were talking about the same creature. That mess drove the creation of standardized codes. By the early twentieth century, separate codified rule sets for animals and plants were in place internationally, governing everything from how names are formed to how disputes about priority are resolved.3Integrative and Comparative Biology. Twenty-First Century Biological Nomenclature—The Enduring Power of Names
These codes still govern taxonomy today. The binomial system (genus + species) remains universal, and the principle of priority, where the first validly published name wins, prevents endless renaming wars. But the codes are not static. Ongoing revisions address issues like electronic-only publication, the naming of organisms known only from environmental DNA, and whether a photograph can serve as a type specimen when no physical specimen exists. These debates might sound arcane, but they directly affect how quickly new species can be formally recognized.
How to Become a Taxonomist
There is no single path, but the most common route runs through academic biology. Most working taxonomists hold a PhD, and the specialization usually begins at the graduate level. An undergraduate degree in biology, ecology, zoology, botany, or a related field provides the foundation. During that time, getting hands-on experience in a natural history museum or herbarium collection is extremely valuable, and many taxonomists trace their career back to an undergraduate mentor who introduced them to specimen-based research.
Graduate school is where the real training happens. A master’s or doctoral program focused on systematics, evolutionary biology, or a taxon-specific discipline (entomology, mycology, ichthyology, and so on) gives you the chance to describe species, learn molecular techniques, and build expertise in a particular group of organisms. Your dissertation will likely involve a taxonomic revision or monograph of some group, which means you come out the other side with deep knowledge of one slice of the tree of life.
Beyond the degree, practical skills matter enormously. Modern taxonomists need to be comfortable with:
- Morphological analysis: using microscopes, dissection tools, and increasingly sophisticated imaging to examine physical features of specimens.
- Molecular methods: DNA extraction, sequencing, and phylogenetic analysis are now standard in most taxonomic labs.
- Bioinformatics: handling large datasets, running sequence alignments, and building phylogenetic trees computationally.
- Scientific illustration or photography: high-quality images and drawings are essential for species descriptions.
- Fieldwork skills: collecting specimens, preserving them properly, and recording ecological data in the field.
Language skills also help. Taxonomic literature spans centuries and many countries, so being able to read older descriptions in Latin, German, or French can save enormous amounts of time. And because taxonomy is deeply collaborative and international, building a professional network through conferences, museum visits, and collaborative projects is part of the job from early on.
Where Taxonomists Work
Most full-time taxonomists are employed by natural history museums, universities, government agencies, or botanical gardens. Museum positions combine collection management with active research: you curate specimens, loan them to other researchers, and conduct your own taxonomic studies. University positions typically involve teaching alongside research, and you might find yourself training the next generation of taxonomists while describing new species on the side.
Government agencies hire taxonomists for applied work in agriculture, public health, biosecurity, and environmental regulation. Identifying invasive species, monitoring disease vectors, and assessing biodiversity in proposed development areas all require taxonomic expertise. Some taxonomists work for environmental consultancies or non-governmental conservation organizations, where their skills are applied to biodiversity surveys and impact assessments.
The job market is tight, and it has been for decades. Positions specifically labeled “taxonomist” are rare compared to broader ecology or molecular biology roles, and many early-career researchers string together postdoctoral fellowships or short-term contracts before landing a permanent position. This scarcity is part of a larger problem the field calls the taxonomic impediment.
The Taxonomic Impediment
Taxonomy has a workforce crisis that has been building for years. The number of expert taxonomists capable of identifying many invertebrate groups has been declining even as the need for species-level identification has grown. The field tends to be held in lower esteem than more experimentally oriented branches of biology, and funding agencies have historically favored hypothesis-driven experimental research over the descriptive work that taxonomy requires.4Aquatic Conservation: Marine and Freshwater Ecosystems. Biodiversity, conservation, and the ‘Taxonomic impediment’
The consequences are real. Conservation biology depends on accurate species identification to designate protected areas and manage endangered species, but if no one alive can reliably identify the organisms in a particular group, that work stalls. Marine invertebrates are a particularly stark example: entire phyla have only a handful of active taxonomists worldwide, some of them retired or approaching retirement with no students training to replace them. Insects, fungi, and nematodes face similar shortages. The irony is that these understudied groups contain the bulk of Earth’s biodiversity.
This situation shapes career prospects in a contradictory way. There is enormous demand for taxonomic expertise, but funding to support taxonomic positions has not kept pace. Someone entering the field should be aware that persistence and flexibility are essential. Many successful taxonomists have built careers by combining taxonomic research with broader ecological or molecular work, making themselves competitive for positions that value both skill sets.
The Modern Toolkit
If taxonomy once relied almost entirely on a sharp eye and a good microscope, the toolkit has expanded dramatically. DNA barcoding, for instance, uses one or more short standardized stretches of DNA to identify organisms to species. The approach is fast, works on fragmentary specimens (a leg, a feather, even environmental traces), and can flag potential new species for further study. Advances in sequencing technology have made barcoding faster, cheaper, and more reliable, and the technique now sees use in fields as varied as forensics, food-supply monitoring, and disease ecology.5PubMed. DNA barcoding, an effective tool for species identification: a review
Integrative taxonomy has become the gold standard for difficult cases. The idea is to combine multiple independent lines of evidence, such as morphology, genetics, ecology, and behavior, to draw boundaries between species. This matters because any single data source can mislead: two species can look identical but differ genetically, or a single species can vary dramatically in appearance across its range. Combining data types reduces the chance of error, though challenges remain, including disagreements among researchers about which species concept to apply and a lack of universal markers that work across all organisms.6PubMed. Species delimitation 4.0: integrative taxonomy meets artificial intelligence In practice, an integrative study might combine traditional morphological measurements with mitochondrial DNA sequences and even novel data types like hyperspectral reflectance profiling to resolve species boundaries.7Zoological Journal of the Linnean Society. Integrative insect taxonomy based on morphology, mitochondrial DNA, and hyperspectral reflectance profiling
Micro-CT scanning, which uses X-rays to create detailed three-dimensional images of small structures, is another game-changer. It allows taxonomists to examine the internal anatomy of specimens without cutting them apart, which is critical when working with rare or irreplaceable type specimens. The scans can visualize wing venation, genital structures, and other features in their natural anatomical position, avoiding the deformations that traditional dissection can cause.8PubMed Central. Micro-CT imaging in species description: exploring beyond sclerotized structures in lichen moths (Lepidoptera: Erebidae, Arctiinae, Lithosiini) The technique has been applied to organisms as varied as ants and moths, and the resulting 3D models can be shared digitally, allowing researchers anywhere in the world to examine specimens virtually.9PubMed Central. Micro-computed tomography: Introducing new dimensions to taxonomy10PubMed Central. Next-generation morphological character discovery and evaluation: an X-ray micro-CT enhanced revision of the ant genus Zasphinctus Wheeler (Hymenoptera, Formicidae, Dorylinae) in the Afrotropics
Artificial Intelligence and Automated Identification
Machine learning, particularly deep learning, is reshaping how organisms get identified in ecological surveys. Computer vision systems trained on large image datasets can now classify specimens rapidly and with impressive accuracy. One study developing a convolutional neural network for aquatic insects achieved an overall accuracy of about 99%, with perfect classification for 68 of the taxa in the dataset, including morphologically similar species that are difficult even for trained human identifiers.11PubMed. Automated identification of aquatic insects: A case study using deep learning and computer vision techniques
These tools offer real promise for speeding up biodiversity monitoring, where the bottleneck is often the time it takes a human expert to sort and identify thousands of specimens from a single sampling event.12Methods in Ecology and Evolution. Machine learning for image based species identification Computer vision can help overcome that bottleneck by rapidly and automatically classifying images.13PubMed. A gentle introduction to computer vision-based specimen classification in ecological datasets
But these systems are not replacing taxonomists. An AI model can only identify species it has been trained on, and training requires expertly identified reference specimens, which taxonomists provide. The models also struggle with species that are absent from their training data, including the undescribed species that taxonomists are specifically looking for. Think of AI identification tools as force multipliers: they make routine identification faster and free up human experts for the harder, more creative work of species discovery and description.
Digital Infrastructure and Global Databases
Taxonomy increasingly depends on large shared digital platforms. The Global Biodiversity Information Facility (GBIF) is the largest biodiversity data aggregator, harmonizing over 2.3 billion occurrence records against a taxonomic backbone informed by many dynamic taxonomic lists and databases.14Trends in Ecology & Evolution. A globally integrated structure of taxonomy to support biodiversity science and conservation These records link species names to locations and dates, making it possible to map distributions, track range shifts, and identify conservation priorities at a global scale.
Other digital resources support the identification process itself. The Library of Identification Resources, for example, compiles taxonomic keys and makes them available as linked data, with over 2,100 works already catalogued.15PubMed Central. Library of Identification Resources: a FAIR overview of taxonomic keys Public sequence databases like GenBank allow researchers to compare their DNA data against a vast library of reference sequences. For a new taxonomist, learning to navigate these platforms is as essential as learning to use a microscope.
Cryptic Species and Why the Work Is Far from Finished
One of the strongest arguments that taxonomy remains vital is the sheer number of species we have not yet recognized. Cryptic species, organisms that look essentially identical to a known species but are genetically and reproductively distinct, are turning up everywhere. A large-scale analysis across vertebrates found that each species defined by morphology alone contained roughly two cryptic species on average, and that number was surprisingly consistent across groups as different as fish and birds.16Proceedings of the Royal Society B. Cryptic species are widespread across vertebrates Only through modern morphometric, genetic, and molecular analyses has this hidden biodiversity been revealed.17PubMed Central. Cryptic species conservation: a review
If the pattern holds broadly, estimates of global species richness could be significantly underestimating reality. That matters for conservation, because a species that appears widespread and secure might actually be several species, each with a smaller range and greater vulnerability. Taxonomists are the people equipped to detect these hidden lineages and get them formally described so they can be protected.
Taxonomy in Public Health
Taxonomic work has direct consequences for human health in ways most people never think about. Mosquito surveillance is a clear example. Accurately identifying mosquito species determines whether a disease-carrying vector has arrived in a new area, which triggers public health responses. In southern Iran, morphological and molecular identification confirmed the presence of the invasive mosquito species that carries dengue fever, a finding that prompted calls for immediate surveillance and control to prevent the vector from establishing permanently.18PubMed. Mosquito surveillance and the first record of morphological and molecular-based identification of invasive species Aedes (Stegomyia) aegypti (Diptera: Culicidae), southern Iran Without taxonomists who can tell one mosquito species from another, that early warning would not exist.
Similar stories play out in agriculture (identifying pest species and their natural enemies), food safety (catching mislabeled seafood through DNA barcoding), and biosecurity (detecting invasive species at ports of entry). In each case, the practical outcome depends on someone getting the identification right, and getting it right requires the foundational species-level knowledge that taxonomists build.
Citizen Science and Its Growing Role
You do not need a PhD to contribute to taxonomy. Citizen science platforms like iNaturalist have created enormous pools of photographic observations, and in some cases, community members have made discoveries that professional taxonomists then formalize. The female of one praying mantis species, for instance, was discovered through citizen science efforts and then formally described in a peer-reviewed paper.19PubMed. Discovery and formal description of the female of Microphotina Beier, 1935 (Mantodea: Photinaidae), with an updated key to species and remarks on the role of Citizen Science in advancing Mantodea biodiversity studies
Parataxonomists, trained local workers who sort and prepare specimens without necessarily having formal degrees, are another important part of the ecosystem. In tropical biodiversity inventories, parataxonomists do much of the specimen processing that feeds into professional taxonomic research. For someone drawn to taxonomy but uncertain about a full academic path, volunteering with a museum collection, contributing observations to citizen science platforms, or working as a parataxonomist in a biodiversity project can all serve as entry points. These roles provide genuine experience and sometimes lead to formal collaborations or co-authorship on species descriptions.
How the History Still Shapes the Present
Modern taxonomy descends from the system Linnaeus developed in the mid-eighteenth century, but it has been through several revolutions since then. The key Linnaean insight was that natural groups are things we discover in nature rather than categories we impose on it, and that discovery requires a synthetic approach drawing on many types of evidence.20TAXON. The Linnaean revolution – A history of the Natural System That principle carried through the Darwinian reframing of classification as reflecting evolutionary history, through the cladistic revolution of the mid-twentieth century that insisted classifications be based on shared derived characters, and through the molecular revolution that added DNA data to the mix.
Each of these shifts changed what it means to be a taxonomist. A working taxonomist in 1950 needed morphological expertise and access to museum collections. A working taxonomist today needs all of that plus molecular lab skills, bioinformatics, and fluency with global databases. The next generation may need proficiency with machine learning tools as well. The breadth of skills keeps expanding, which makes the training period long but also makes the work genuinely varied. Few scientific careers ask you to hike through cloud forests, peer through electron microscopes, write code, and publish in Latin, sometimes in the same project.