Springtails (class Collembola) are tiny, ancient arthropods - among the most abundant and widespread animals on Earth, with over 9,000 described species living everywhere from Antarctic ice to tropical forests. In the hobby they're prized as a cleanup crew, breaking down waste and controlling mould in terrariums and vivaria. They come in a surprising range of types, from the familiar white springtails used in bioactive setups to colourful purples and reds, globular "ball" species, and the snow fleas that hop across winter snow. This guide explains the main groups, the popular hobby species, and what they all have in common.
One important point up front: despite their insect-like look, springtails are not insects. They're hexapods (six-legged arthropods) in their own class, Collembola - a separate lineage that diverged from true insects long ago. They're completely harmless: they don't bite or sting people, and they're not pests but beneficial decomposers.
What Makes a Springtail a Springtail
Springtails are small, typically 1-6 mm long, with body shapes ranging from slender and elongated to round and globular. Their defining feature - and the source of their name - is a forked, tail-like appendage called the furcula, folded under the abdomen like a loaded spring. When threatened, a springtail releases the furcula, catapulting itself several times its own body length away from danger in a fraction of a second. (A few soil-dwelling species have a reduced furcula and rely on crawling instead, but the spring-loaded jump is the group's signature.)
Most springtails live in moist places - leaf litter, soil, rotting wood, around water - where they feed on decaying organic matter, fungi, algae and bacteria. That diet makes them essential nutrient recyclers, and a key reason they're so useful in a bioactive enclosure.
The Three Main Groups
Scientists divide springtails into three main orders, told apart mainly by body shape. All three can jump using a furcula.
- Poduromorpha - plump, oval-bodied springtails with short legs, often grey or black with a velvety or granular surface. Usually 1-2 mm, found in leaf litter, soil and decaying matter. The famous snow fleas belong here.
- Entomobryomorpha - the slimmest, most elongated springtails, with well-developed furculae and sometimes long legs and antennae. Typically 2-4 mm, common in moss, leaf litter and damp soil, and some have an attractive metallic sheen. The popular white springtail, Folsomia candida, sits in this group.
- Symphypleona - the globular or "ball" springtails, with rounded, almost spherical bodies and long antennae. These are excellent jumpers, using a well-developed furcula, and are often found on vegetation, in soil and in mosses.
Identifying springtails to species is genuinely difficult and often needs a microscope, since many look alike and the same species may go by several common names.
Popular Hobby Springtails
For keepers, a handful of species do most of the work in terrariums and cultures. The classic is the temperate white springtail, Folsomia candida - hardy, fast-breeding, easy to culture and the standard cleanup crew for countless bioactive setups. Beyond it, you'll come across colourful and novelty types prized for visibility and variety:
- White / temperate springtails (Folsomia candida) - the reliable all-rounder, ideal for almost any humid setup.
- Orange springtails - a bright, easy cleanup crew that's more visible than the white species.
- Thai red springtails - a vivid red, warmth-loving species well suited to tropical vivaria.
- Globular springtails - the round "ball" species, increasingly popular as eye-catching display animals in planted terrariums.
You can find cultures in our springtails collection, where the different types are offered ready to seed a new enclosure.
Snow Fleas: The Winter Survivors
One of the most remarkable springtails is the snow flea (Hypogastrura nivicola and relatives) - the tiny dark specks you can see hopping across the surface of snow on a mild winter's day. Their trick is a special antifreeze protein in their body fluids that stops ice crystals forming, letting them stay active in subzero conditions when most life is dormant.
Despite the name, snow fleas aren't fleas at all: they don't bite or harm people or animals. Like all springtails they're harmless decomposers, feeding on algae, fungi and decaying matter, and they jump with a furcula rather than flea-like legs. They're not confined to snow, either - the same and similar species turn up in leaf litter, under rocks and in damp ground year-round.
Springtails in the Garden and Soil
Out in the garden, springtails are an unsung cleanup crew. By feeding on fallen leaves, dead insects and rotting wood, they speed up decomposition and release nutrients back into the soil, improving its fertility. As they move through the substrate they also help with aeration, creating tiny channels that let air and water reach plant roots and giving beneficial bacteria and fungi room to establish. And they form a key link in the food web, feeding all manner of small predators - spiders, beetles, ants and more.
To encourage them in a garden, keep things moist and rich in organic matter: compost, leaf litter and mulch all provide the damp, food-rich conditions springtails love.
Cave and Specialist Springtails
Springtails have colonised some extreme places. Cave-dwelling species are a good example: living in permanent darkness, many have lost their eyes entirely, navigating instead by antennae sensitive to vibration, humidity and chemical cues. In the nutrient-poor cave environment they feed largely on fungal threads and bacteria, helping cycle what little organic matter reaches underground. Others have gone the opposite way - water springtails (Podura aquatica) live on the surface of ponds and streams, kept afloat by water-repellent hairs, feeding on algae and detritus. This adaptability across habitats, from glaciers to cave walls to pond surfaces, is exactly what makes the group so successful worldwide.
Keeping Springtails: The Essentials
Whichever type you keep, the basics are the same and refreshingly simple. Springtails need a moist, organic substrate (coconut fibre, leaf litter and a little charcoal works well), consistently high humidity, and a steady supply of decaying matter, mould or a purpose-made springtail food to feed on. Most reproduce quickly, so a small starter culture soon becomes a thriving colony, and seeding a new enclosure is as easy as transferring a little substrate from an established culture. They pair perfectly with isopods in a cleanup crew, working the mould and microfauna while the isopods tackle larger debris.
Frequently Asked Questions
Are springtails insects?
No - despite looking insect-like, springtails are hexapods in the class Collembola, a separate lineage that's no longer classed among true insects. They're harmless and beneficial, not pests.
What are the main types of springtails?
There are three main orders: Poduromorpha (plump, oval bodies), Entomobryomorpha (slender, elongated - including the popular white Folsomia candida), and Symphypleona (the round, globular "ball" springtails). All can jump using a furcula.
Which springtails are best for a terrarium?
The temperate white springtail (Folsomia candida) is the classic all-rounder, hardy and fast-breeding. Orange springtails and warmth-loving Thai red springtails are popular colourful alternatives, and globular springtails make eye-catching display animals.
Are snow fleas a type of springtail?
Yes - snow fleas (Hypogastrura nivicola) are springtails, not fleas. They're harmless and famous for an antifreeze protein that lets them stay active on snow in freezing conditions. They don't bite or harm people or animals.
Do springtails bite?
No. Springtails have tiny mouthparts for eating decaying matter and fungi, not for biting. They pose no harm to people, pets or plants and are valued as beneficial decomposers.
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