Regular Episode
029 – ETHNOBIOLOGY — A LIZARD’S TALE
The connection came about at TAM 8 (The Amazing Meeting, sponsored by the James Randi Educational Foundation), where a listener suggested the hosts speak with Dr. Russell about the surprising overlap between ethnobiology and cryptozoology. As Blake notes, this episode is “the inverse of how it usually happens” — a scientist who actually found a new animal by following up on local folklore.
🦎 What Is Ethnobiology?
Ethnobiology is the study of relationships between human cultures and the living world — essentially, the accumulated ecological knowledge of local or indigenous communities about the flora and fauna around them. Dr. Russell explains that this knowledge is often found in sociological rather than biological literature, and is frequently dismissed by scientists as mere folklore. As his own research demonstrates, that dismissal can be a costly mistake.
🦕 The Monster Gecko of New Zealand
The centerpiece of the episode is Dr. Russell’s discovery of a spectacularly large gecko specimen that had been sitting in a museum in Marseille, France since approximately 1803 — stuffed, shellacked, and eventually filed away in a plastic bag in a filing cabinet. When Dr. Russell finally obtained radiographs of it, he confirmed the bones were in proportion: the skull, limbs, and body were all consistent with a real animal roughly three times the size of any known gecko species. Head at the shoulder, tail base at the waist when held against a human body.
Anatomical features narrowed its origin to either New Caledonia or New Zealand. Investigating Māori oral tradition, Dr. Russell found descriptions of a creature called the kawekaweau — a large, striped, tree-dwelling lizard with a described habitat and size that matched the specimen precisely. These accounts had long been dismissed by scientists as garbled descriptions of the tuatara, New Zealand’s iconic living fossil. They weren’t. The ethnobiological record had been accurately describing a real, undocumented gecko — complete with Māori carvings that everyone had assumed were imaginary. (The animal is now identified as the extinct Delcourt’s giant gecko, Hoplodactylus delcourti.)
🌍 Folklore as a Safety System — Lesotho Field Stories
Dr. Russell spent time early in his career in Lesotho, a landlocked country surrounded by South Africa, where he interviewed local people about reptile folklore. Two stories stand out:
– A local belief that the bite of a common agama lizard will cause a person to laugh until they die. (Dr. Russell tested this personally. He is still here.)
– A water snake said to guard all sizable bodies of water, draining brains through the nostrils — conveniently invisible to Europeans. The more mundane origin: the Basotho people, who relocated to the mountains from lowland territory around 1840 to escape tribal conflict, had an unfamiliarity with local wildlife and a cultural aversion to water. Cautionary folklore filled the gap.
Dr. Russell draws a broader point: a great deal of monster folklore functions as socially transmitted safety information, particularly when communities encounter unfamiliar environments. The “don’t go in the lake” warning attached to creatures like Champ or Ogopogo follows exactly the same pattern.
🐍 Hoop Snakes, Tsuchinoko, and Biological Feasibility
The conversation turns to cryptids whose reported physical properties strain credulity from a biomechanical standpoint. The hoop snake — a serpent said to bite its own tail and roll like a wheel — appears independently in American folklore, Japanese accounts of the Tsuchinoko, and ancient Ouroboros symbolism. Dr. Russell finds the universality interesting but not convincing: wheels are simply more efficient than legs for locomotion, so the appeal of imagining a rolling snake is understandable. The mechanism for actually achieving it, however, is biomechanically untenable. The Tsuchinoko’s reported body mass, meanwhile, would require a density roughly seven times that of any known living organism.
Similar scrutiny applies to lake monsters. Dr. Russell has analyzed Cadborosaurus — the reported sea serpent of the waters between mainland British Columbia and Vancouver Island — examining the relationship between drag, thrust, and the swimming speeds claimed in eyewitness reports. The reconstructed morphology, he concludes, doesn’t match any known vertebrate locomotion pattern. For Nessie, the biological feasibility questions multiply: diet, reproduction, and population viability in a landlocked loch all require explanation before invoking a living plesiosaur. His framing is appealingly Sherlockian: eliminate the possible before concluding the improbable.
🦎 The Amazing Feet (and Tails) of Geckos
Dr. Russell devotes a satisfying stretch of the conversation to the biology that makes geckos genuinely extraordinary — no cryptids required.
On adhesion: gecko toe pads use millions of microscopic hair-like structures called setae to achieve adhesion via van der Waals forces — a theoretical explanation proposed as early as 1902 but not testable until nanotechnology caught up around 2000. The engineering challenge being pursued today isn’t just getting things to stick; it’s replicating the gecko’s equally elegant release mechanism. Geckos have been solving this problem for roughly 150 million years.
On autotomy: Dr. Russell’s current lab work focuses on autotomized leopard gecko tails — the detached tails that continue moving after separation from the body. The tail doesn’t merely twitch; it jumps, somersaults, and responds to environmental contact for up to half an hour, all without a brain, driven by central pattern generators in the spinal tissue. This research has potential applications in understanding ischemia and paralysis — the detached tail is a natural, non-traumatic ischemic preparation. As Dr. Russell puts it: “Here’s a monster, essentially — this tail doing strange things in the absence of the owner.”
A small but telling aside: a peer-reviewed paper published in 2000 — the landmark study that first rigorously measured gecko adhesion forces — ran a photograph of a tokay gecko with a Photoshopped claw added to its first digit. The first digit of a gecko’s foot has no claw; the researcher assumed the image was damaged and “corrected” it. Even scientists, it turns out, sometimes see what they expect rather than what’s there.
🌿 Island Giants and the Geography of Monsters
Karen’s question about the concentration of giant extinct animals in New Zealand and Australia prompts a brief but illuminating digression on island gigantism and ecological release. Isolated landmasses — New Zealand, the Galápagos, Aldabra Atoll — tend to produce oversized animals when large mammalian predators and competitors are absent. South America’s long isolation before the Great American Interchange (roughly 3–4 million years ago via the Panamanian Isthmus) produced giant predatory birds and bizarre early mammals for the same reason. Extinct Australian giant monitor lizards — Megalania — fit neatly into this framework: large body size on a continent with few competing mammalian predators, and, as Dr. Russell notes, being big is not the same as being bizarre.
📚 Further Reading
– 📚 River Monsters 💵 by Jeremy Wade (the TV series River Monsters is mentioned approvingly by Dr. Russell as a showcase for how genuinely astonishing real freshwater animals can be)
🔗 Related Links
– Delcourt’s Giant Gecko (Hoplodactylus delcourti)
– Ethnobiology (Wikipedia)
– Cadborosaurus
– Tsuchinoko
– Hoop Snake
– Autotomy (tail shedding in lizards)
– Central Pattern Generator
– Megalania (extinct giant monitor lizard)
– Island Gigantism
– Architeuthis (giant squid)
Note: ads inserted into the distributed audio alter the timestamps in unpredictable ways, so timing references in these notes are approximate.
IN THIS EPISODE, the MonsterTalk crew interviews Dr. Tony Russell, a professor at the University of Calgary who studies evolutionary and functional morphology in geckos. Dr. Russell’s work includes ethnobiology — the utilization of folklore to guide his research. He discuss the uses and limitations of this mode of research, as well as the remarkable features of the lizards that he studies.
In this episode
- how ethnobiology works within biology research
- folklore and tales of mysterious animals
- geckos and their amazing feet
- giant lizards
- plus sundry discussions of minotaurs, centaurs and puns.
Music
- Monstertalk Theme: Monster by Peach Stealing Monkeys
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