Snowflake Springtails (Onychiuridae sp.)

This springtail cannot jump. Onychiuridae have no working furcula, the sprung lever that other springtails fold under the body and release to fling themselves clear, and across the whole family it is reduced to a stub or absent altogether. The practical result: lift the lid and nothing pings out at you. They walk. If you have ever tried to seed an enclosure from a lively culture and lost half of it across the worktop, you will see the point of that straight away.

What they use instead is chemistry. Pseudocelli, pores set in rows along the body, release a fluid that predators find unpleasant, and it works well enough that ants tend to leave them alone. It is the defence of an animal built to sit tight, not one built to flee.

They are sold as Onychiuridae sp. 'Snowflake', and that is as far as the name honestly goes. There is no genus behind it that I can point to, so I will not invent one, and 'Snowflake' itself is a hobby trade name with no scientific standing. The animals are under 2mm, white to almost colourless, and eyeless, which tells you a good deal about where they live. The family is cosmopolitan.

You will see less of them than you expect

Worth being straight about this one. Snowflakes are a deep-soil species, not a surface one. They live down in the substrate and come up mainly when the medium is saturated, so a healthy culture can look empty. Read that as a feature of the animal, not a fault in the culture. A surface springtail works the top centimetre; these work the full depth of the substrate, which is where most of the decomposition in a bioactive setup actually happens. The reliable tell that a culture is running is the eggs, laid in large clusters that stand out clearly against the medium, so you get a reading on progress without needing to see the adults.

Culture conditions

Temperature is where they differ most from the tropical species. Anything from 10 to 26°C suits them, an unusually wide and temperate-tolerant band, so a UK room carries them without heat and a cool cupboard does not stall them. Moisture needs to be high and constant. Ventilation runs against the usual advice: keep it minimal, hold the tub sealed or close to it, and open it roughly once a week to change the air and feed. Coco coir or a pesticide-free organic soil both work as a medium, kept thoroughly damp, with charcoal or leaf litter mixed through if you have it. Feed lightly on brewer's yeast, a few grains of rice or a pinch of fish flake, and lift out anything that moulds. Eggs hatch in seven to ten days and the young are breeding themselves in roughly two to three weeks, so numbers climb quickly once a culture settles.

The job they do is decomposition. They graze mould, fungal growth, decaying plant matter and waste, which keeps a humid enclosure from going furry and stops a small spill turning into an outbreak. In an isopod or millipede tub they work alongside the animals instead of competing with them, and because they stay in the substrate they stay out of the display. The wider springtail range splits along two lines. Yellow springtails and Orange springtails spring off when disturbed and show far more on the surface. Temperate springtails are the standard workhorse for a cool room. Thai Red also walks, though it needs tropical warmth to keep a culture ticking over. The springtail mystery box tries several at once.

These are supplied as an established starter culture rather than a counted number of animals, so what arrives is a working medium with adults, juveniles and egg clusters already in it. Tip the whole thing into a larger tub of damp coir or organic soil, put it somewhere stable, and resist opening it more than once a week while it establishes. Give it two or three weeks before you start harvesting, and judge it on egg clusters, since the adults stay out of sight. Dispatch is Monday to Thursday and no later, tracked, next-day, so nothing of ours sits in the postal network across a weekend.