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James T. Stroud

@jameststroud.bsky.social
1.9K followers 296 following 277 posts

Asst Prof @ Georgia Tech. Evolutionary ecology using lizards 🦎🦎🦎 most interested in connecting micro-scale processes to macro-scale patterns

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Reposted by James T. Stroud
Benjamin Freeman @benjaminfreeman.bsky.social · 4h
*** please share widely *** Georgia Tech is hiring an ecologist tinyurl.com/GT-eco-coasts - general search - submit by Dec 1 - come join us, we have a growing group of excellent + collegial eco eco folks (e.g., @armanafzadeh.bsky.social, Sean Anderson, @jameststroud.bsky.social, Lauren Speare)
google.com
Redirecting
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James T. Stroud @jameststroud.bsky.social · 09/08/2026
Incredible!
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James T. Stroud @jameststroud.bsky.social · 08/08/2026
Super cool PhD positions on the evolutionary ecology of exceptional lizards in the Swierk lab! 🦎🦎🦎
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Z. Jack Tseng @tsengzj.bsky.social · 30/07/2026
Exhilarated to share a 2nd @science.org cover article this month from our lab @ucberkeleyofficial.bsky.social! A collaboration with US & Mexico colleagues on the role of a Mexican biogeographic holding pen in shaping the Great American Biotic Interchange (GABI)(1/11) www.science.org/doi/10.1126/...
Cover of Science magazine for July 30, 2026. Caption from Science reads: A three-dimensional rendering shows the land bridge connection between North and South America. Research on the fossil record of mammals in Mexico suggests that the geographic region acted as a biodiversity “holding pen” for 10 million years, buffering the pace of both northward and southward movements of mammal species leading up to the Great American Biotic Interchange.
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Science Magazine @science.org · 30/07/2026
Research on the fossil record of mammals in Mexico suggests that the geographic region acted as a biodiversity “holding pen” for 10 million years. Learn more this week in Science: scim.ag/4xhNmQ9
A three-dimensional rendering shows the land bridge connection between North and South America. Research on the fossil record of mammals in Mexico suggests that the geographic region acted as a biodiversity “holding pen” for 10 million years, buffering the pace of both northward and southward movements of mammal species leading up to the Great American Biotic Interchange.

Illustration: C. Bickel and V. Penney/Science. Data: NASA Blue Marble Imagery, August 2026; B. Tozer, D. T. Sandwell, W. H. F. Smith, C. Olson, J. R. Beale, P. Wessel, Global bathymetry and topography at 15 arc sec: SRTM15+ (2019), distributed by OpenTopography, https://doi.org/10.5069/G92R3PT9, accessed 24 June 2026
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BES Evolutionary Ecology Group @bes-evolecol.bsky.social · 21/07/2026
We’re very excited to confirm that Rosemary Grant will be giving our inaugural online webinar in September. It’s free to all, so please look out for details of how to sign up for tickets.
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Dr Mark D. Scherz @markscherz.bsky.social · 27/06/2026
Incredible. That’s Frankfurt, London, and the Smithsonian all with calls for herpetology curators open at the same time. Unheard of!
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James T. Stroud @jameststroud.bsky.social · 23/06/2026
Congrats! Great paper!
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Elle Barnes @ecoevoelle.bsky.social · 22/06/2026
With the #BYI announcement buzz settled, I’ve been reflecting on what this award means to me. 🎓 It’s a win for R2s, a boost for #wildlifegenomics 🐸🧬🖥️, and a testament to my @rittigers.bsky.social lab of students ✨ Reflections here: bit.ly/4xGNhX9 Thank you to @beckman-foundation.bsky.social!
megalabrit.weebly.com
Reflecting on the BYI: A Win for Salamanders, Mentorship, and the Road Less Traveled
​If you had told me years ago that a career spent chasing salamanders through the woods would lead to being named a 2026 Beckman Young Investigator  (BYI), I’m not sure I would have believed...
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James T. Stroud @jameststroud.bsky.social · 22/06/2026
Fantastic news!! Congrats!!!!
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Reposted by James T. Stroud
Jonathan Losos @jblosos.bsky.social · 21/06/2026
Robert Ricklefs - in memoriam dynamicecology.wordpress.com/2026/06/11/r...
dynamicecology.wordpress.com
Robert Ricklefs – in memoriam
Robert Ricklefs, a giant of ecology, passed away on Sunday. It is hard to overstate the extensive impact Bob had on the field. He was elected a member of the National Academy of Sciences in the US,…
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Reposted by James T. Stroud
Tony Gamble @tonygamble.eurosky.social · 20/06/2026
I am so looking forward to this new book about boas! 🐍🧪 #Herpetology #Snake www.cornellpress.cornell.edu/book/9781501...
cornellpress.cornell.edu
Boas of the World by edited by R. Graham Reynolds and Robert W. Henderson | Hardcover | Cornell University Press
Boas of the World is a guide to all sixty-six species currently recognized in the seven families composing the superfamily Booidea. Bringing together the expertise of more than sixty contributors repr...
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Jill M. Love, PhD 🏳️‍🌈 @jillmlove.bsky.social · 20/06/2026
🎉 PUBLISHED!!!! Out now in @newphyt.bsky.social 🎉 We found positive selection on leaf shape plasticity in a Monkeyflower species. This experiment used two big field transplants, greenhouse, AND growth chamber work. It was hard, but awesome. With @ferrisifolius.bsky.social doi.org/10.1111/nph....
doi.org
Phenotypic plasticity is broadly adaptive across an elevation gradient in the Cutleaf Monkeyflower
Leaf shape plasticity expression is variable in Mimulus laciniatus.
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Armita R. Manafzadeh @armanafzadeh.bsky.social · 18/06/2026
Our print copies have arrived in the mail! This has been fun/humbling/ridiculous/exciting all at once. Little me would think I’m pretty cool today. Big me thinks I still have a lot of work to do — can’t wait to start my lab at @gtsciences.bsky.social this fall. #SciAmYoungScientists
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Germán Orizaola @gorizaola.bsky.social · 18/06/2026
18 June 1858 The day Charles Darwin received a letter from Alfred Russel Wallace that will change everything.. and speed up the presentation of the theory of evolution by natural selection, and the publication of "On the origin of species". www.darwinproject.ac.uk/letter?docId...
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Georgia Tech College of Sciences @gtsciences.bsky.social · 16/06/2026
🎉 @armanafzadeh.bsky.social has been named to @sciam.bsky.social’s inaugural class of Young American Scientists for her innovative research. Manafzadeh will join Georgia Tech this fall as an assistant professor in the School of Biological Sciences. Learn more: biosciences.gatech.edu/news/fossils...
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James T. Stroud @jameststroud.bsky.social · 17/06/2026
Yes Armita! Go go go! Can't wait for you to start you lab here with us! 🔥🔥🔥 🎉🎉🎉
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
Want to give it a go? Try LizardLens on your own south Florida anole lizard photos! 🦎🦎🦎 👉 lizard-class.cc.gatech.edu
lizard-class.cc.gatech.edu
Lizard Lens
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
It's live as a web app with interactive bounding-box correction & ranked predictions, and it will soon power my lab's middle-school community science outreach program "Lizards on the Loose," — better data + authentic science for middle-schoolers! 📄🦎🧑‍🔬👩‍🔬 doi.org/10.64898/202...
doi.org
LizardLens: A Two-Stage Deep Learning Pipeline for Detecting and Classifying Similar Species in Visually Complex Environments
Community science platforms like iNaturalist generate unprecedented volumes of biodiversity data, but their scientific utility depends critically on accurate species identification; a persistent chall...
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
Using Grad-CAM, we looked at what the model "pays attention to" — and it converged on the same cues expert taxonomists use: head shape, limbs, feet, ocular rings, body patterning. Nobody told it to; it learned that straight from the images
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
Our key approach was to split the job into two stages: A YOLO detector finds the lizard 🦎, then a Swin Transformer IDs the species from the cropped image 🖼️ Across iNaturalist photos of 5 Florida anole species, the model rarely missed or mislabeled a lizard, and had high species ID accuracy!
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
Second: LizardLens 🔍🦎 Platforms like iNaturalist generate huge biodiversity datasets — but their value depends on correct species IDs, which is tough when contributors aren't taxonomists and species look alike... LizardLens helps fix that automatically 🎯
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
Try it yourself — upload your own images and explore the tool here 👉 haag-1.cc.gatech.edu
haag-1.cc.gatech.edu
Lizard X-Ray
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
Best part: no coding, no install — it runs in your browser And, most importantly, it's a general platform...not just for lizards! 🦎🙅‍♂️ We retrained it on fruit fly wings 🪰 and dropped it into the same interface for you to see 🔍 Open-source & free 📄 doi.org/10.64898/202...
doi.org
LizardMorph: A generalizable machine learning framework for automated anatomical landmark detection in digital images
Morphological measurements underpin a wide range of ecological and evolutionary research, yet the manual landmarking workflows on which most morphometric studies depend remain a persistent bottleneck ...
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
So, why do this? Experienced annotators in my lab were 37.5% faster ⚡ with LizardMorph compared to manual placement with TpsDig2 (with no loss of accuracy) LizardMorph purposefully integrates a Human-in-the-loop design: predictions are editable starting points (see image), not final answers
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
We fine-tuned an ML-Morph shape predictor on dorsal X-rays of Anolis lizards (34 landmarks each). Landmarks on well-defined skeletal structures hit 💯% accuracy within 1mm 🔥 You upload images, the model predicts, and you fix the occasional outlier (e.g., toetips) with point-and-click edits 📏🖱️
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
First up: LizardMorph 📏 Modern morphometric studies live or die by manual landmarking — placing dozens of anatomical points on every image by hand. It's slow, tedious, and a genuine bottleneck in my lab 🦎 LizardMorph automates the grunt work with ML while keeping the researcher in control 🎛️
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James T. Stroud @jameststroud.bsky.social · 15/06/2026
Two new preprints from my lab, both putting computer science approaches to work for ecology & evolution 🦎 Each tackles the same old bottleneck — turning huge piles of digital images into usable data — and each is a free, open-source web tool you can actually use 🎉 Quick threads on both below 🧵
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Sam Brown @brownlab.bsky.social · 11/06/2026
Thanks @markowenmartin.bsky.social, this was great fun to do, I really enjoyed our chat. Keep up the great work!
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Matthew Herron @matthewherron.bsky.social · 28/05/2026
Black skimmer, Merritt Island National Wildlife Refuge, Florida #birds #wildlifephotography
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James T. Stroud @jameststroud.bsky.social · 28/05/2026
What a photo!
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Ben Sheldon @sheldonbirds.bsky.social · 27/05/2026
This exceptional event (in terms of absolute temperature) is also unusual in coinciding with the time that we monitor breeding great and blue tits in Wytham Woods: we're hoping to do some assessment of possible effects fairly soon.
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James T. Stroud @jameststroud.bsky.social · 26/05/2026
Go @benjaminfreeman.bsky.social another banger and with a 💯 co-author line up!! 🏔️
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Benjamin Freeman @benjaminfreeman.bsky.social · 25/05/2026
I think a lot about how mountain species are responding to warming temperatures so it was great to team up with @suzetteflantua.bsky.social @kjfeeley.bsky.social Christi McCain & Jenny McGuire to write a review of sp responses to both modern AND Quaternary warming www.nature.com/articles/doi...
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The International Biogeography Society @biogeography.bsky.social · 18/05/2026
Join us on May 27th for the next Funk Biogeography Seminar! Dr. Michael Landis from Washington University in St. Louis will be speaking about the use of phylogenetic models to explore the biogeography of the past. Learn more and register here: www.biogeography.org/news/news/ma...
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James T. Stroud @jameststroud.bsky.social · 17/05/2026
This is wild. Who are these people?
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James T. Stroud @jameststroud.bsky.social · 16/05/2026
😂 no worries at -- Dan G would be thrilled you're talking about that research!! We are now building lizard robots together...🦎
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James T. Stroud @jameststroud.bsky.social · 16/05/2026
Georgia Tech not UGA!! @gtsciences.bsky.social
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James T. Stroud @jameststroud.bsky.social · 13/05/2026
Summer 2026 field season is here! 🦎🦎🦎
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James T. Stroud @jameststroud.bsky.social · 08/05/2026
Great idea and superb work @benjaminfreeman.bsky.social and Georgia Tech students! 📊🙅‍♂️
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Benjamin Freeman @benjaminfreeman.bsky.social · 08/05/2026
ok, so some good and some bad but are we getting better as a field? I think this is the best news - authors are increasingly showing the data over time in pretty much all journals, even within our narrow 5 year sample!
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Benjamin Freeman @benjaminfreeman.bsky.social · 08/05/2026
“Above all else, show the data” — Edward Tufte But do biologists follow this directive? To find out, we analyzed 8,834 figures from 2,930 studies published between 2021 and 2025 in 18 journals from five fields of biology journals.asm.org/doi/10.1128/...
journals.asm.org
“Showing the data” in published biology research | mBio
“Above all else, show the data”—Edward Tufte (1)
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The Royal Society @royalsociety.org · 08/05/2026
Happy 100th birthday to the living legend and national treasure that is Sir David Attenborough. Few figures alive have done as much for nature and conservation as Sir David, and we've been very lucky to work with him over the years. #DavidAttenborough #Attenborough100 #Nature #PlanetEarth
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The Linnean Society of London @linneansociety.bsky.social · 08/05/2026
Our warmest and wildest 100th birthday wishes to Sir David Attenborough, vice-patron of our Society. Today, we are celebrating Priam's Birdwing, which he said he would include in his "ark" to protect from extinction. This illustration is from E Donovan's "An Epitome of...Insects of India" (1800).
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James T. Stroud @jameststroud.bsky.social · 07/05/2026
Yes go @choosyfemale.bsky.social !! 🎉🎉🎉🏆🏆🏆
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Chris Martin @fishspeciation.bsky.social · 07/05/2026
I'm on NPR "All Things Considered" today talking about the near-extinction of the Devils Hole pupfish this past year and the federal agency management chaos that ensued! 🐟😈🕳️ www.npr.org/2026/05/07/n...
npr.org
As federal scientists faced turmoil, the Devils Hole pupfish reached a crisis point
The Devils hole pupfish lives in just one spot in Death Valley. Wildlife officials have managed this iconic fish for decades, and last spring, just as the Trump administration was laying off all kinds...
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James T. Stroud @jameststroud.bsky.social · 07/05/2026
Yes go @choosyfemale.bsky.social !! Crushing it! 🎉🎉🎉
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James T. Stroud @jameststroud.bsky.social · 04/05/2026
Woohoo go @katie-is-alive.bsky.social !! 🎉🎉🎉
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Ken Toyama @kenstoyama.bsky.social · 28/07/2025
Low-density high-hollowness bones vs high density low-hollowness bones in anoles! academic.oup.com/evolut/artic...
academic.oup.com
Evidence supporting an evolutionary trade-off between material properties and architectural design in Anolis lizard long bones
Abstract. In biology, “many-to-one mapping” occurs when multiple morphological forms can meet a particular functional demand. Knowledge of this mapping is
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