RedCircle VERIFY_TOKEN_9fa19f80-793b-4520-9e61-37fd39f6a3f2 -- Rendered At Thu, 28 May 2026 14:46:32 +0000 Sketchbook Biology https://redcircle.com/shows/sketchbook-biology en-US All rights reserved. Ruchitha Ratnayake Hi it's Ru, and you've reached the official podcast of a man gushing about strange animals and cool science using doodles on his sketchbook. This podcast is a sister production for a YouTube channel of the same name. Please do visit if you would like a more visual experience. 9fa19f80-793b-4520-9e61-37fd39f6a3f2 Hi it's Ru, and you've reached the official podcast of a man gushing about strange animals and cool science using doodles on his sketchbook. This podcast is a sister production for a YouTube channel of the same name. Please do visit if you would like a more visual experience.

]]> episodic no Ruchitha Ratnayake sketchbook.biology@gmail.com no full The Treehopper - Tuning into electric fields The Treehopper - Tuning into electric fields Ruchitha Ratnayake Treehoppers are tiny bugs with some of the funkiest exoskeletons! Recent research suggests that in some species, the extravagant ornamentation on their shell can actually help sense the tiny electric fields given off by their predators and friendlier bugs. This episode covers the wonderful research of 


Music:

"Morning" Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 4.0 License

http://creativecommons.org/licenses/by/4.0/


"Evening" Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 4.0 License

http://creativecommons.org/licenses/by/4.0/


"Sincerely" Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 4.0 License

http://creativecommons.org/licenses/by/4.0/

]]> <p>Treehoppers are tiny bugs with some of the funkiest exoskeletons! Recent research suggests that in some species, the extravagant ornamentation on their shell can actually help sense the tiny electric fields given off by their predators and friendlier bugs. This episode covers the wonderful research of </p><p><br></p><p>Music:</p><p>&#34;Morning&#34; Kevin MacLeod (incompetech.com)</p><p>Licensed under Creative Commons: By Attribution 4.0 License</p><p>http://creativecommons.org/licenses/by/4.0/</p><p><br></p><p>&#34;Evening&#34; Kevin MacLeod (incompetech.com)</p><p>Licensed under Creative Commons: By Attribution 4.0 License</p><p>http://creativecommons.org/licenses/by/4.0/</p><p><br></p><p>&#34;Sincerely&#34; Kevin MacLeod (incompetech.com)</p><p>Licensed under Creative Commons: By Attribution 4.0 License</p><p>http://creativecommons.org/licenses/by/4.0/</p> 78445ce2-9707-4f9b-ba41-fd51d77390ca https://youtu.be/qOvDFw7thuQ?si=LriPiua5upWIg-lK Tue, 26 Aug 2025 12:56:52 +0000 582 no full The Colugo - An adorable tree hugging gremlin The Colugo - An adorable tree hugging gremlin Ruchitha Ratnayake Meet the colugo, nature’s attempt at making a squirrel, a bat, and a blanket all at once. It doesn’t actually fly, it just commits to falling with style. By day, it clings to trees, snoozing away the daylight. By night, it launches itself from tree to tree, munching on leaves with their very very special chompers.


Music:

Kalimba Relaxation Music Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 3.0 License

http://creativecommons.org/licenses/by/3.0/


"Ethereal Relaxation" Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 4.0 License

http://creativecommons.org/licenses/by/4.0/


"Magic in the Garden" by Rafael Krux


"Slice of Life" by Bryan Teoh

]]> <p>Meet the colugo, nature’s attempt at making a squirrel, a bat, and a blanket all at once. It doesn’t actually fly, it just commits to falling with style. By day, it clings to trees, snoozing away the daylight. By night, it launches itself from tree to tree, munching on leaves with their very very special chompers.</p><p><br></p><p>Music:</p><p>Kalimba Relaxation Music Kevin MacLeod (incompetech.com)</p><p>Licensed under Creative Commons: By Attribution 3.0 License</p><p>http://creativecommons.org/licenses/by/3.0/</p><p><br></p><p>&#34;Ethereal Relaxation&#34; Kevin MacLeod (incompetech.com)</p><p>Licensed under Creative Commons: By Attribution 4.0 License</p><p>http://creativecommons.org/licenses/by/4.0/</p><p><br></p><p>&#34;Magic in the Garden&#34; by Rafael Krux</p><p><br></p><p>&#34;Slice of Life&#34; by Bryan Teoh</p> 450c0ff5-17b9-477f-9ca8-d42cbe7b5807 https://youtu.be/PsE5dwr9wN8?si=ovu5RTFzY7j726U7 Tue, 26 Aug 2025 12:52:06 +0000 888 no full The Giraffe assassin bug - A spider's worst nightmare The Giraffe assassin bug - A spider's worst nightmare Ruchitha Ratnayake If you ask me, the giraffe assassin bug gets a little too cozy with spiders for comfort. But then again, when you’re a tiny predator with a towering neck and a dagger for a mouth—living in Australia, no less—you’re probably not losing sleep over a few creepy crawlies

If you would like a more visual experience with me speaking over my sketches, please visit Sketchbook Biology on YouTube.

Here's a few scientific articles where you can learn more about this not-so adorable, but very cool bug:

  • Biology of Stenolemus giraffa (Hemiptera: Reduviidae), a web invading, araneophagic assassin bug from Australia, by F.G. Soley, R.R. Jackson & P.W. Taylor


  • Fine-scale analysis of an assassin bug's behaviour: predatory strategies to bypass the sensory systems of prey, by F.G. Soley


  • Biology and life history of the araneophagic assassin bug Stenolemus bituberus including a morphometric analysis of the instars (Heteroptera, Reduviidae), by A.E. Wignall & P.W. Taylor


Music:

Concentration Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 3.0 License

http://creativecommons.org/licenses/by/3.0/

]]> <p>If you ask me, the giraffe assassin bug gets a little too cozy with spiders for comfort. But then again, when you’re a tiny predator with a towering neck and a dagger for a mouth—living in Australia, no less—you’re probably not losing sleep over a few creepy crawlies</p><p><span>If you would like a more visual experience with me speaking over my sketches, please visit Sketchbook Biology on YouTube.</span></p><p>Here&#39;s a few scientific articles where you can learn more about this not-so adorable, but very cool bug:</p><ul><li>Biology of Stenolemus giraffa (Hemiptera: Reduviidae), a web invading, araneophagic assassin bug from Australia, by F.G. Soley, R.R. Jackson &amp; P.W. Taylor</li></ul><p><br></p><ul><li>Fine-scale analysis of an assassin bug&#39;s behaviour: predatory strategies to bypass the sensory systems of prey, by F.G. Soley</li></ul><p><br></p><ul><li>Biology and life history of the araneophagic assassin bug Stenolemus bituberus including a morphometric analysis of the instars (Heteroptera, Reduviidae), by A.E. Wignall &amp; P.W. Taylor</li></ul><p><br></p><p>Music:</p><p>Concentration Kevin MacLeod (incompetech.com)</p><p>Licensed under Creative Commons: By Attribution 3.0 License</p><p>http://creativecommons.org/licenses/by/3.0/</p> 729c98c4-2836-4f12-96fc-8701b045d57a https://youtu.be/CgSvr7vykU0?si=xk_bso9WFXYJV5PC Tue, 26 Aug 2025 12:46:50 +0000 1129 no full The Texas horned lizard - Nature's spikiest little pancake The Texas horned lizard - Nature's spikiest little pancake Ruchitha Ratnayake Meet the Texas horned lizard—a tiny, spiky pancake. Despite its fierce name, this little lizard mostly just lounges in the sun, munches ants like they're popcorn, and tries its best to blend in with the dirt. And if you just won't leave this desert diva alone, it might just squirt you with blood from its eyes. This was my very first attempt at sketching these guys! it was not the smoothest, but it was extremely fun. 

If you would like a more visual experience with me speaking over my sketches, please visit Sketchbook Biology on YouTube.

Here's a few scientific articles where you can learn more about this adorable lizard:

  • Natural history of the Texas horned lizard, Phrynosoma cornutum (phrynosomatidae), in Southeastern Colorado
  • Avoiding being stung or bitten – prey capture behaviors of the ant-eating Texas horned lizard (Phrynosoma cornutum)
  • Integumental water movement and rate of water ingestion during rain harvesting in the Texas horned lizard, Phrynosoma cornutum
  • Antipredator blood-squirting defense in horned lizards (Phrynosoma): Chemical Isolation of Plasma Component(s), Pogonomyrmex Ant Dietary Origin, and Evolution


Music:

Ancient Winds Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 3.0 License

http://creativecommons.org/licenses/by/3.0/

Music promoted by https://freemusicbg.com

and https://www.chosic.com

]]> <p>Meet the Texas horned lizard—a tiny, spiky pancake. Despite its fierce name, this little lizard mostly just lounges in the sun, munches ants like they&#39;re popcorn, and tries its best to blend in with the dirt. And if you just won&#39;t leave this desert diva alone, it might just squirt you with blood from its eyes. This was my very first attempt at sketching these guys! it was not the smoothest, but it was extremely fun. </p><p>If you would like a more visual experience with me speaking over my sketches, please visit Sketchbook Biology on YouTube.</p><p>Here&#39;s a few scientific articles where you can learn more about this adorable lizard:</p><ul><li>Natural history of the Texas horned lizard, Phrynosoma cornutum (phrynosomatidae), in Southeastern Colorado</li><li>Avoiding being stung or bitten – prey capture behaviors of the ant-eating Texas horned lizard (Phrynosoma cornutum)</li><li>Integumental water movement and rate of water ingestion during rain harvesting in the Texas horned lizard, Phrynosoma cornutum</li><li>Antipredator blood-squirting defense in horned lizards (Phrynosoma): Chemical Isolation of Plasma Component(s), Pogonomyrmex Ant Dietary Origin, and Evolution</li></ul><p><br></p><p><strong>Music:</strong></p><p>Ancient Winds Kevin MacLeod (incompetech.com)</p><p>Licensed under Creative Commons: By Attribution 3.0 License</p><p>http://creativecommons.org/licenses/by/3.0/</p><p>Music promoted by https://freemusicbg.com</p><p>and https://www.chosic.com</p> 4270cc17-146e-4bf8-a1d6-171d463dd200 https://youtu.be/CgSvr7vykU0?si=xk_bso9WFXYJV5PC Tue, 26 Aug 2025 12:24:21 +0000 1346 no