The degu, a diurnal species: why natural light matters
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
The degu, or Chilean degu, stands out among pet rodents: it's active during the day rather than at night. A study by Vivanco, Rol and Madrid, published in 2007 in the Journal of Pineal Research, shows that its internal biological clock depends closely on regular exposure to natural light and on melatonin secretion tied to a clear day-night cycle. Find our other tips in the bedding and habitat section.
Contents · 4 sections
A biological clock set to daylight
Where a hamster or a gerbil manages fine with an essentially nocturnal routine, a degu needs a sharp contrast between daylight and nighttime darkness to properly synchronize its internal rhythm. Artificial lighting left on into the evening, or a room without any natural light, disrupts this cue and can throw off its behavioral rhythm.
Positioning the cage correctly
The cage does best in a bright room during the day, near a window but out of direct sun and drafts, so it benefits from natural light that shifts naturally through the day. For sizing and general setup, see our guide on what cage for a Chilean degu. In the evening, avoid leaving bright lighting near the cage late into the night — the same principle applies to its dust bath, best offered during the day rather than at dusk.
What happens when the rhythm is disrupted?
A degu exposed to irregular lighting can become active at unusual hours, less predictable for its owner, without this necessarily pointing to a health problem on its own. Restoring a regular light cycle is usually enough to correct the situation within a few days.
Frequently asked questions
Can a degu live in a room with no window?
It's not ideal: without natural light, it's best to at least recreate a strict, regular day-night cycle with scheduled artificial lighting.
Should all light be avoided at night?
Yes where possible: clear darkness at night reinforces the contrast that synchronizes its biological clock.
Is a degu completely inactive at night?
No, moderate activity can persist in the evening, but the activity peak stays diurnal in a properly synchronized animal.
See it in the Planète Pets shop: Natural loofah chew carrot for rabbits and rodents, 20 cm (€17.90) · the whole shop
See it in the Planète Pets shop: Electric pet heating pad 45 × 45 cm (17.7 in) with chew-resistant cord ($48.90, ships from the US) · the US shop
This guide is part of Planète Pets’s Rodents universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.