Smologies #22: REPTILES & AMPHIBIANS with David Steen

Episode Summary

Executive Summary: This episode introduces herpetology—the study of amphibians and reptiles—through a playful interview with wildlife ecologist and conservation biologist Dr. David Steen. It explores snake fear, species identification, frog rains, amphibian life cycles, snake anatomy and behavior, and why these animals are often misunderstood. The episode also emphasizes conservation, curiosity, and respecting wildlife.

Main Topics: What Herpetology Is: The host defines herpetology as the study of amphibians and reptiles, explains related scientific terms like poikilothermic and ectothermic, and frames the episode as a kid-friendly introduction to herps. Dr. David Steen's Work and Identity: Steen describes himself primarily as a wildlife ecologist and conservation biologist, while acknowledging that herpetology fits because much of his work focuses on amphibians and reptiles. Snake Fear, Misconceptions, and Identification: The conversation addresses why people fear snakes, arguing that fear is partly learned socially. Steen explains that snakes are not sneaky so much as defensive and hard to find, and he describes his ability to identify snakes by overall pattern and impression. Amphibian and Snake Biology: The interview covers amphibian respiration, diverse life histories, axolotls as paedomorphic salamanders, snake anatomy, vestigial legs in boas and pythons, and the evolutionary shift from lizards to snakes. Unusual Animal Phenomena and Adaptations: The episode discusses frog storms and similar animal rain events, as well as snake adaptations such as constriction, venom, tail and body specialization, and survival without limbs. Conservation and Career Advice: Steen explains the value of working with motivated colleagues and recommends gaining experience, testing interests, and building community for anyone considering a career in herpetology or wildlife ecology.

Key Arguments: Snake fear is often socially reinforced rather than purely innate; children may initially show curiosity, then absorb adult fear. Snakes are better described as defensive and avoidant than sneaky or malicious. Amphibians use multiple strategies for respiration, including gills, lungs, and skin, depending on species and life stage. Some species, like axolotls, retain juvenile traits throughout life, showing how varied amphibian development can be. Snake evolution is messy; some snakes retain vestigial leg structures, and legless lizards complicate the boundary between groups. Frog and other animal rain events can occur when storms or water spouts move animals from temporary habitats and drop them elsewhere. The best part of Steen's job is working with passionate colleagues toward shared conservation goals. Aspiring wildlife professionals should get experience in many ways and see whether the work fits before committing.

Data Points: Largest rattlesnake species: Eastern diamondback rattlesnake - Described as the largest rattlesnake in the world and found in the southeastern United States. Axolotl habitat: A few lakes in Mexico - Axolotls are said to live exclusively in a small number of lakes in Mexico. Snake congregations in winter: Tens of thousands - Garter snakes gather in places like the snake pits in Narcisse during winter and emerge in spring. Animal rain types mentioned: Frog, fish, spider, toad, and worm storms - The discussion notes several kinds of animals that have been reported falling in storms. Snake body proportion: Tail is about the last eighth of the body - In response to where a snake’s tail begins, Steen explains the tail is a small portion of the body.

Pivotal Quotes: "Snakes are really hard to find. They're always hiding, but I don't really think of them as sneaky. I think of them as scared." — Dr. David Steen: Explaining snake behavior and correcting the idea that snakes are malicious or deceptive. "Imagine you had to survive in the woods with no arms and no legs. How long would you last?" — Dr. David Steen: Highlighting the remarkable adaptability of snakes as a group. "I think it would be accurate to call me a herpetologist." — Dr. David Steen: Clarifying his professional identity during the introduction.

Implications: The episode reframes reptiles and amphibians as diverse, adaptive, and often misunderstood, encouraging curiosity over fear and highlighting conservation-minded respect for wildlife.