A box of live insects is not a normal parcel. It is a small, sealed environment with a clock running on it, and everything inside it is there to keep that environment survivable until someone opens the lid. This guide explains how live-insect shipments are built and why they are built that way. It is a general account of how the practice works across the trade, not a description of any one company's method. For the specifics of your own order, our shipping page sets out the terms.
Why live insects travel differently from everything else
Feeder insects are ectotherms. They do not generate meaningful body heat, so their internal temperature tracks whatever the air around them is doing. A parcel of crickets sitting on a loading dock at 34°F is a parcel of crickets at 34°F, give or take whatever the packaging is buying them.
That single fact drives every packing decision. The box is not protecting a product from damage. It is holding a temperature, an oxygen supply and a moisture level steady for as long as the journey takes. Three things can go wrong, and they go wrong in different ways:
- Cold. Slow. Insects stop moving well before they die, and cold damage accumulates over hours.
- Heat. Fast. Metabolism rises, the container gets damp, and a hot box cannot cool itself down.
- Bad air. Silent. Carbon dioxide, ammonia and condensation build up in a container that cannot breathe.
Everything in the paragraphs below is an answer to one of those three.
What a live-insect parcel is made of
Most live-insect shipments in this category are built in layers. The names and materials vary between shippers, but the jobs do not.
| Layer | What it does |
|---|---|
| Primary container | Holds the insects. Ventilated, usually with mesh or perforations. Sized so the animals are not crushed by their own numbers. |
| Bedding or structure | Egg flats, cardboard or bran give the insects surface area to spread out on instead of piling. Piling is a major cause of loss. |
| Secondary containment | A bag or second box that catches escapees and contains any spill. |
| Insulation | Foam or laminated liner. Slows the rate at which outside temperature reaches the inside. |
| Thermal element | A heat pack in cold weather, a cold pack in hot weather, neither in mild weather. |
| Void fill | Stops the primary container sliding around, and keeps the thermal element from resting against it. |
| Outer box | Takes the mechanical abuse of the sorting network and carries the vent holes. |
The insulation and the thermal element are frequently mistaken for the same thing. They are not. Insulation slows heat transfer in both directions. A heat pack adds heat. A box with a heat pack and no insulation loses that heat almost as fast as it produces it. The two are designed to work together, and neither does much alone. There is more on this in our guide to heat packs and cold packs.
Ventilation, and why a sealed box is the wrong instinct
The intuitive move in cold weather is to seal everything tightly. It is the wrong move, for three separate reasons.
Insects respire. A dense container of crickets in a sealed box will run its oxygen down and its carbon dioxide up. Insects also excrete, and in a warm, damp, unventilated container the waste produces ammonia. Keepers widely report ammonia buildup in poorly ventilated cricket containers as a cause of mass die-off, and in their experience it works quickly once it starts.
The third reason is the one people miss. Disposable shipping heat packs are air-activated. Their chemistry is an oxidation reaction that consumes oxygen through a microporous pouch. A heat pack in a genuinely airtight box competes with the animals for the same air and then goes out. Vent holes are not a compromise on insulation. They are load-bearing.
How the packing changes by feeder
Different feeders fail in different ways, so they are packed differently.
Crickets
The most fragile thing most shippers handle. Crickets need airflow, dry conditions and vertical surface area, and they suffer badly from piling, damp and stale air. They are also the feeder most affected by delay, because their tolerance for a bad container is short. Density in the shipping container matters more for crickets than for anything else on the list.
Roaches
Dubia roaches are considerably more forgiving in transit. They tolerate a wider range of conditions, cope better with being handled, and do not need the same airflow margin. They are still ectotherms and still cold-sensitive, but they are a much easier animal to get from one place to another intact. Our dubia roach care guide covers the bin to move them into when they arrive.
Worms and grubs
Mealworms, superworms and waxworms generally travel in bedding rather than on structure. Bedding does two useful jobs at once: it gives them somewhere to be, and it buffers temperature swings. Mealworms and waxworms are usually kept cool in storage, superworms are not, and that difference matters for what you do at your end more than for what happens in transit.
Isopods, springtails and cultures
Isopods and other clean-up crew ship in a damp substrate rather than a dry one, because drying out is their main risk instead of overheating. The packing problem reverses: the container has to hold moisture and still breathe.
Transit time is the most important packing material
Every layer above is a way of buying hours. Insulation buys hours. A heat pack buys hours. Ventilation buys hours. None of them buys days.
This is why the practice across the live-animal trade is to move shipments quickly and to have them in transit for as few nights as possible. A journey that takes one night needs the packaging to hold for one night. A journey that takes three has to survive three overnight lows, and the difference is not linear, because damage accumulates.
It also explains something that looks arbitrary from the outside: shippers of live animals care about which day of the week a box moves. A parcel that reaches a sorting facility on a Friday and sits until Monday has spent the weekend in an unconditioned building. The packaging was not designed for that. It is why our orders ship sometime between Sunday and Wednesday. We do not promise a ship date or a delivery date, and the terms are on our shipping page. We ship to the 48 contiguous states and Washington, DC only, not to Alaska, Hawaii or US territories, and we do not ship dubia roaches to Florida.
What the packaging cannot do
Good packing narrows the range of outcomes. It does not eliminate the bad end of it. Three things sit outside the box's control:
- Weather at both ends and everywhere between. The forecast where you live says little about the overnight low at a sorting hub 600 miles away.
- Delays. A thermal element is rated for a duration. Once that duration is used up, the box is just a box.
- The last few hours. A parcel that survives the network and then sits on a sunlit porch or in a closed metal mailbox can lose there what it held onto for a thousand miles.
That last one is the one you can actually do something about. Our guide on what to do when your feeders arrive covers the first ten minutes after the box lands, and seasonal shipping covers what changes between January and July.
Where to find the terms for your order
This guide describes how live-insect shipping works as a practice. It does not state how any particular order will be handled, and nothing in it should be read as a term of sale.
That information is on our shipping page, which covers when orders ship, weather holds, where we ship, and the live arrival guarantee that applies if a shipment arrives in poor condition. If you are choosing between feeders on how well they travel rather than on nutrition, the full feeder range is the place to start.