Transporting a sulcata tortoise: what a study on a giant cousin reveals about stress
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
The sulcata tortoise grows fast and becomes, within a few years, one of the heaviest tortoises a private keeper can own — an adult can top 50 kg. Transport then raises a logistics question first, covered in our article on the captive growth of the sulcata tortoise. But a study on an equally placid-looking giant cousin is a reminder of a physiological question hiding underneath: how can anyone tell if the animal is coping poorly with handling, when it almost never shows an outward sign of stress?
A calm-looking tortoise hiding two distinct hormonal profiles
Currylow, Louis and Crocker published in 2017, in Conservation Physiology, a study on the hormonal response to handling in radiated tortoises (Astrochelys radiata), a wild, endangered species from Madagascar (see the study). The authors measured blood corticosterone before and after a standardised capture. The striking result: only half of the tortoises showed a dramatic rise in this stress hormone, while the other half stayed nearly stable — two clearly separated response profiles, with no in-between state. Animals with a "reactive" profile also differed in body condition and home range from those with a "stable" profile, suggesting this hormonal difference reflects a lasting trait of the animal rather than chance timing.
What this changes for a captive sulcata tortoise
This study does not cover the sulcata tortoise itself, but a giant land tortoise with an equally placid-looking demeanour — a parallel that argues for revisiting a common reflex:
- Don't trust the absence of a visible reaction: a tortoise that doesn't retract its head and lets itself be carried without fuss can still be going through an invisible hormonal spike.
- Support the weight from underneath the body, never by the shell above the limbs, for handling as brief and stable as possible, whatever the animal's apparent temperament.
- Plan for adult weight from the first few years, since this species' growth quickly outgrows a crate sized for a juvenile.
- Watch appetite in the days after a trip, rather than behaviour during the trip itself, to spot the "reactive" individuals.
Frequently asked questions
Why cite a study on the radiated tortoise rather than the sulcata?
In the absence of a published study on handling stress specific to the sulcata tortoise, the radiated tortoise study — another large land tortoise with comparable behaviour — offers the closest available angle in the scientific literature.
Does an adult sulcata tortoise travel the same way as a juvenile?
No: past a few kilograms, two people and a rigid support become necessary, and the travel crate needs resizing as the animal grows.
Does this species need a specialised vet?
A vet experienced with exotic pets is recommended, especially to assess a large tortoise. Find all our guides on the reptile hub.
This guide is part of Planète Pets’s Reptiles universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.