Dogs that sort dragon scat from lookalikes found one sample in more than 100 field surveys
Zoos Victoria's detection dogs found one Victorian grassland earless dragon scat in more than 100 surveys of known dragon areas. A separate trial found ants and other insects likely scavenged over a third of available scats within 24 hours.
The Scientist · Science desk
Key figures: within 24 hours, more than a third of available scats were scavenged, likely by ants and other insects. The persistence study used 44 scat samples from captive dragons at Melbourne Zoo. Fewer than 0.01 scats were found per survey: one scat in more than 100 surveys.
| Figure | Value | Note | Claim |
|---|---|---|---|
| Window in which over a third of scats were scavenged | 24 hours | 9 | |
| Captive scat samples | 44 samples | 7 | |
| Scats found per survey, fewer than | 0.01 scats | one scat in more than 100 surveys | 14 |
What happened
- The lizard was rediscovered in 2023 in a sheep pasture in western Victoria after more than 50 years undetected, and that remains the only known population.
- Two dogs, Sugar (a German shorthaired pointer cross) and Moss (a Labrador retriever), both reliably told dragon scat from other reptile scat of similar size.
- Zoos Victoria's Wildlife Detection Dog Squad has trained and deployed seven dragon dogs so far, working with herpetologists since 2023.
- Ants were already carrying off captive-dragon scat before the samples were placed in the grassland where the species was rediscovered.
Why it matters
- constraint With over a third of available scats gone in a day, a survey that turns up no scat cannot show that dragons are absent from a patch.
- capability Scat can confirm that a species is present, so a dog that separates dragon droppings from lookalikes could verify presence without anyone finding the animal, provided some scat remains.
- contradiction The dogs' scent discrimination and the field yield point in opposite directions, so the discrimination result alone does not show that dog surveys make monitoring practical.
One scat across more than 100 surveys [6] is under 0.01 scats per survey [14]. That yield depends on two things outside the dog's control: how many dragons are present and how long their droppings last.
The team, led by La Toya Jamieson of Zoos Victoria, went looking for the missing droppings [2]. Dragon scat is a brown, crumbly grain of rice [11]. The study set out to measure how long it persists in grassland and what makes it disappear, with weather among the candidate factors [13]. The authors say that, combined with the dragons' low density, the scavenging left very few scats around long enough to be detected [10].
The 44 samples in the persistence trial came from captive dragons at Melbourne Zoo [7], and the dogs can tell captive scat from wild scat [5]. The one-day loss is therefore a stand-in for field droppings, which could last longer or shorter. The phys.org account does not say whether wild scat vanishes at the same rate, and "reliably" comes without hit or false-alarm rates for the dogs.
We think the dogs' scent work is the part of this system that has held up so far, on the authors' account. What limits the surveys is how long scat persists. A scat survey for a single-site species with few animals has to reach the droppings before the ants do, and the persistence data are what a search schedule would have to be built on.
What to watch
- Results on weather and other factors that remove scat, which the study set out to measure.
- Persistence data for wild dragon scat, since the 44 trial samples came from captive animals.
- Hit and false-alarm rates for Sugar and Moss, and whether a schedule built on scat persistence lifts the yield above one scat in 100-plus surveys.
Clarity's read
What the record supports and how the coverage leans. The claims behind it follow.
Reality
- Evidence50
- Adoption20
- Hype gap−5
- Incentives
- Insufficient
- Confidence55
Claim ledger
Ranked by verification strength, evidence, and original report placement.
- [1]
The Victorian grassland earless dragon was rediscovered in a sheep pasture in western Victoria in 2023 after evading detection for more than 50 years, and this remains the only known population in the world.
- [2]
The study, led by La Toya Jamieson from Zoos Victoria, investigated whether wildlife detection dogs could help protect the dragons by first finding their scat.
- [3]
Since 2023, Zoos Victoria's Wildlife Detection Dog Squad has worked with specialist herpetologists to train dragon dogs; seven have been trained and deployed to detect grassland earless dragons.
- [4]
Sugar, a German shorthaired pointer cross, and Moss, a Labrador retriever, were both able to reliably smell the differences between Victorian grassland earless dragon scat and other similar-sized reptile scat.
- [5]
The dogs were sensitive enough to distinguish between the scat of captive and wild dragons.
- [6]
After more than 100 field surveys in areas known to have dragons, the dogs detected only one scat.
- [7]
The researchers collected 44 scat samples from captive dragons at Melbourne Zoo for the persistence study.
- [8]
Before the samples were placed in the grassland where the species was rediscovered, some were already being carried away by ants.
- [9]
In the next 24 hours, more than a third of available scats were scavenged, likely by ants and other insects.
- [10]
The authors say this scavenging, combined with an overall low density of dragons, means very few tiny dragon scats remained long enough for detection.
- [11]
Dragon scat resembles a brown, crumbly grain of rice.
- [12]
Scat samples can provide information about the health, diet and distribution of an animal or population, and can confirm whether a species is present in a certain area.
- [13]
The researchers developed a study to measure how long scat persists in grasslands and investigated what factors, such as weather, may cause it to disappear.
- [14]
One scat in more than 100 surveys is fewer than 0.01 scats per survey.
Get this ledger inside ChatGPT. Ask about any of our stories and the answer brings its figure, each claim’s verdict and the sources. Free, no account.
Sources
1 independent publisher whose own reporting we read for this story.
- phys.orgHow detection dogs are helping protect one of Australia's most imperiled lizards
1 article · October 14, 2026
Topics and entities
Follow any of these and your For You feed starts watching them — no settings page required.