Northampton Reptile Centre's in-store and online range lays out enclosures, heating, lighting and substrate side by side, which makes it easier to see how the pieces fit together rather than guessing from separate listings on different sites. Staff on the shop floor handle these setups day to day and can talk through what a particular species actually needs versus what's optional.

What a care sheet can't do, and was never meant to do, is replace a vet. Husbandry guidance covers what a healthy animal needs day to day: the right temperature gradient, appropriate substrate, correct lighting, a sensible feeding schedule. It doesn't, and shouldn't, attempt to cover what to do if an animal stops eating, shows changes in behaviour, or displays anything that looks like illness or injury.

Care sheets are one of the most useful tools available to a reptile keeper, setting out the basics of temperature, humidity, diet and enclosure size for a given species in one place. Northampton Reptile Centre care sheet library Centre publishes care sheets covering species including the Hermann's tortoise, leopard gecko, corn snake and White's tree frog, and they're a sensible starting point for anyone researching a species or double-checking their current setup.

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Enclosure is the more general, catch-all term that avoids the debate entirely, and it's increasingly the word used in care guidance because it doesn't imply a specific style of build. A glass-fronted wooden cabinet, a mesh-sided setup for arboreal species, and a fully planted bioactive tank could all reasonably be called an enclosure, regardless of whether someone else in the hobby would call them a vivarium or a terrarium.

Strictly speaking, a terrarium originally referred to a planted enclosure built around live vegetation, closer to a small indoor garden than a housing unit for an animal. A vivarium, by contrast, technically refers to any enclosure built to house a living creature, whether that's a reptile, amphibian or invertebrate, with or without live planting. In practice, though, UK retailers and keepers use both terms fairly loosely, often depending on regional habit or supplier naming rather than any strict definition.