Dr Mark D. Scherz

@markscherz.bsky.social

Curator of Herpetology & Associate Professor of Vertebrate Zoology at Natural History Museum of Denmark • ERC StG: GEMINI • Co-host of SquaMates Podcast and AnatomyInsights on Youtube • He/Him

I am very excited: a paper I have been working on for a very long time, including descriptions of seven new frog species, will be dropping tomorrow apparently! If you are a #SciComm journalist and interested in covering the story, hit me up! 🧪🐸

Yesterday I presented what I think was the first conference poster of my career 😅 at #SMBE2026, talking about my ERC StG project on the genomics of miniaturisation in vertebrates—GEMINI. Really happy for the discussions it sparked. Thanks everyone who stopped by! 🧪

A selfie of Mark standing beside his poster, which features a penguin trying to explain what miniaturisation is and why it matters.

I am searching for a monograph: Gislén, T., and H. Kauri. 1959. Zoogeography of the Swedish amphibians and reptiles with notes on their growth and ecology. Acta Vertebratica. Stockholm 1: 197–397. Anyone happen to have a copy of this issue of Acta Vertebratica? Probably no PDFs exist! 🧪

~Record scratches~ “Yeah, that’s me. I’m sure you are all wondering how I got here. Well, to explain that we have to go all the way back to the time I was just sprouting my hind legs…”

A large frog staring rather muppet-like at the camera, like Jim on The Office. The frog is being held in the gloved hand of a man.

Today I caught one of the largest frogs of my life. This gigantic Pelophylax ridibundus belongs to a Balkan lineage (formerly P. kurtmuelleri) that has an established introduced population in one lake in central Copenhagen. They are about twice the size of our native green frogs! 🐸🧪

Yours truly and the Very Large Frog, our faces with the same expression. The Frog (the F is capitalised; a proper noun for a proper Frog) is huge, about the size of my face, and held in a gloved hand.

Anyone else *hate* the term 'nested PCR'? Nested implies one round of PCR from template and then a second round on the product to amplify a piece within it. That's not what it is. It is tiled: separate PCRs on different, overlapping bits. Calling it 'nested' confused me for a solid decade. 🧪

We talk about the glamour of field research all the time. Today I spent three hours uploading mostly-hand-written receipts one by one into our finance system. I don’t think I’m even a quarter of the way done. What a thrill. Such glamour. Time, well, spent 🤷‍♂️🧪

Had one of those moments where I thought SURELY everyone must know about the frog genus Mini, home to tiny frogs Mini mum, Mini scule, and Mini ature, only to text several friends and realize this isn't common knowledge. So now you, dear BlueSky friends, get to learn too. 🐸 🧪

The XKCD Lucky 10,000 comic, about how for each thing everyone supposedly knows by the time they're adults, each day there are approximately 10,000 people in the U.S. hearing about it for the first time. The second panel usually shows someone asking about diet coke and mentos and their friend saying oh man, come on, we're going to the grocery store. In this one, diet coke and mentos has been replaced with The Mini frog genus, and the grocery store has been replaced with Madagascar.

Three weeks after being in the rainforest of Madagascar, I spent the day surveying reptiles and amphibians in Denmark. Somewhat different weather. But still very rewarding. We saw a whopping NINETEEN adders! 🐍🧪

A large female adder, curled in a defensive posture among leaf litter, sticks, and rocks.