Jonathan Losos
@jblosos.bsky.social
📤 866
📥 572
📝 85
Evolutionary biologist, herpetologist, cat lover.
Amazon has decided to unload my books at bargain basement prices!
9 days ago
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Spoil Islands in Florida: an Opportunity for Anole Experiments in the Wild
www.anoleannals.org/2025/10/30/s...
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Spoil Islands in Florida: an Opportunity for Anole Experiments in the Wild
Invasive species are a growing problem across our increasingly globalized planet. They are often adept at establishing stable population sizes very quickly, which allows them to outcompete native s…
https://www.anoleannals.org/2025/10/30/spoil-islands-in-florida-an-opportunity-for-anole-experiments-in-the-wild/
10 days ago
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If you look carefully, you'll see that the text is written by yours truly. I won't comment on that, but ther photographs are extraordinary!
www.amazon.com/Feline-Photo...
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Feline: Photographs
Amazon.com: Feline: Photographs: 9781419773648: Flach, Tim, Losos, Jonathan: Books
https://www.amazon.com/Feline-Photographs-Tim-Flach/dp/141977364X/ref=sr_1_1?crid=3DXOCJ5UFBKOU&dib=eyJ2IjoiMSJ9.9iyqeUlTvOHUjOBh1KZu3Eu-NwU7bRrHhK_H3TyGC1SsM-FgvB4Gd20TNldlII6VyKfGECMQGNGTwVAXilG9rmAF6qBxZWhDDCkDpqyBrMZLpDcHmj4pcyncdmRpZkuEUUgur2Olapcd1BcWuUlTDcJsLerCDssoVeiVdb9YWd64lMU6reDS-CzCiVX8lXnBMLVZlZqGT3Frv_vUMVz-pvaD8RblykXty0qx7OgblzA.GCVbPIHt4fHcySjegdlLCo9srVSb28SdVSGHrVW7s2g&dib_tag=se&keywords=tim+flach&qid=1760195715&s=books&sprefix=tim+flach%2Cstripbooks%2C128&sr=1-1
18 days ago
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Rebreathing Semi-aquatic Anoles: Just a Scuba Tank… or Something More?
www.anoleannals.org/2025/10/15/r...
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Rebreathing Semi-aquatic Anoles: Just a Scuba Tank… or Something More?
Over the past several years, semi-aquatic anoles experienced a bit of viral fame for “scuba diving,” a nickname for their ability to rebreathe a bubble of air over their nostrils while diving…
https://www.anoleannals.org/2025/10/15/rebreathing-semi-aquatic-anoles-just-a-scuba-tank-or-something-more/
25 days ago
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‘Pirates’ of the Caribbean: The luck and pluck of three-legged lizards
Researchers from Washington University in St. Louis and the Georgia Institute of Technology study lizards who have lost limbs to understand how omnipresent the forces of natural selection can be, and ...
https://source.washu.edu/2025/10/pirates-of-the-caribbean-the-luck-and-pluck-of-three-legged-lizards/
26 days ago
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3-legged lizards can thrive against all odds, challenging assumptions about how evolution works in the wild
theconversation.com/3-legged-liz...
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3-legged lizards can thrive against all odds, challenging assumptions about how evolution works in the wild
Most lizards probably don’t survive devastating injuries. But a new study documents 122 cases of limb loss across 58 species – these exceptions shine a new light on natural selection.
https://theconversation.com/3-legged-lizards-can-thrive-against-all-odds-challenging-assumptions-about-how-evolution-works-in-the-wild-262467?utm_source=bluesky&utm_medium=bylineblueskybutton
27 days ago
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See Stunning Feline Photography Revealing the Science of Cats
Tim Flach captures his fascination with the science of cats in stunning photographs from his new book Feline
https://www.scientificamerican.com/article/stunning-cat-photos-reveal-feline-science/
about 1 month ago
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awesome photos! Check out who wrote the text!
www.cbsnews.com/video/how-a-...
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How a wildlife photographer found one of his biggest challenges with house cats
Wildlife photographer Tim Flach has been around the world to get the perfect shot. But his latest book, titled "Feline," may have been one his biggest challenges.
https://www.cbsnews.com/video/how-a-wildlife-photographer-found-one-his-biggest-challenges-with-house-cats/
about 1 month ago
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More on Anole Eye Spots
www.anoleannals.org/2025/09/04/m...
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More on Anole Eye Spots
Some green anoles sometimes temporarily develop a black spot behind their eyes. We had a great post on why this happens in 2011. Spoiler: it’s a sign of stress. Reader Seth Whaland has provid…
https://www.anoleannals.org/2025/09/04/more-on-anole-eye-spots/
2 months ago
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Anolis cybotes, the Hispaniolan Stout Anole
floridensis.com/2025/08/26/a...
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Anolis cybotes, the Hispaniolan Stout Anole
Last updated on Tuesday 26 August 2025.Florida is home to an array of non-native Anolis species. Some of these introduced species are extremely widespread, such as Anolis sagrei (the Cuban brown an…
https://floridensis.com/2025/08/26/anolis-cybotes/
2 months ago
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New Orleans' Brown Anoles Can Tolerate Extraordinary Amounts of Lead in Their Blood
www.anoleannals.org/2025/08/23/n...
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New Orleans’ Brown Anoles Can Tolerate Extraordinary Amounts of Lead in Their Blood
Tulane University reports: Lead-resistant lizards in New Orleans could hold clues to combating lead poisoning August 20, 2025 9:00 AM Stacey Plaisance
[email protected]
Tulane researchers found…
https://www.anoleannals.org/2025/08/23/new-orleans-brown-anoles-can-tolerate-extraordinary-amounts-of-lead-in-their-blood/
3 months ago
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Fight Fiercely Harvard
open.substack.com/pub/perilous...
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Fight Fiercely Harvard
Settling with the federal government may be the right call for Harvard, but doing so will be a blow to American democracy
https://open.substack.com/pub/perilous/p/fight-fiercely-harvard?r=1d2uek&utm_campaign=post&utm_medium=web&showWelcomeOnShare=false
3 months ago
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Israel's Gaza War Has Made Me Ashamed to Be a Jewish Zionist
open.substack.com/pub/perilous...
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Israel's Gaza War Has Made Me Ashamed to Be a Jewish Zionist
Israel's fight against Hamas started as a just war, but is now a moral travesty
https://open.substack.com/pub/perilous/p/israels-gaza-war-has-made-me-ashamed?r=1d2uek&utm_campaign=post&utm_medium=web&showWelcomeOnShare=false
3 months ago
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Leiocephalus carinatus, the Northern Curly-tailed Lizard
Last updated on Friday 25 July 2025.At some point in the 1940s, somebody decided to intentionally release a number of non-native Northern curly-tailed lizards (Leiocephalus carinatus armouri, speci…
https://floridensis.com/2025/07/25/leiocephalus-carinatus/
4 months ago
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At long last, The Cat's Meow featured in the New York Times...sort of.
www.nytimes.com/.../books/re...
4 months ago
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The Alluring Anoles of Alto Velo
www.anoleannals.org/2025/07/19/t...
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The Alluring Anoles of Alto Velo
Although I have not been a prolific poster on AA, I have enjoyed contributing articles about the obscure and rarely seen anoles of the Greater Antilles and Lucayan archipelagos, such as Anolis erne…
https://www.anoleannals.org/2025/07/19/the-alluring-anoles-of-alto-velo/
4 months ago
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Some Thoughts on Trumpism and Soviet Communism on a Visit to Prague
open.substack.com/pub/perilous...
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Some Thoughts on Trumpism and Soviet Communism on a Visit to Prague
With Trump’s tariffs and immigration police, there are echoes of Eastern Europe’s authoritarian past
https://open.substack.com/pub/perilous/p/some-thoughts-on-trumpism-and-soviet?r=1m8blq&utm_campaign=post&utm_medium=web&showWelcomeOnShare=false
4 months ago
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Non-native Herps Still Increasing in the Most Heavily Invaded Herp Community in the World.
www.anoleannals.org/2025/07/06/n...
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Non-native Herps Still Increasing in the Most Heavily Invaded Herp Community in the World.
There truly is never a dull moment in South Florida, especially for those of us who love herps. South Florida is a herper’s paradise with at least 63 exotic herps recorded in the state in addition …
https://www.anoleannals.org/2025/07/06/non-native-herps-still-increasing-in-the-most-heavily-invaded-herp-community-in-the-world/
4 months ago
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<i>How I built a 6 foot long stainless steel anole lizard sculpture</i>: the Movie
www.anoleannals.org/2025/06/03/h...
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How I built a 6 foot long stainless steel anole lizard sculpture: the Movie
Read about Steve Nielsen, the artist, here.
https://www.anoleannals.org/2025/06/03/how-i-built-a-6-foot-long-stainless-steel-anole-lizard-sculpture-the-movie/
5 months ago
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Dewlap Drama in the Slender Anole: a Tale of Two Throats
www.anoleannals.org/2025/06/01/d...
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Dewlap Drama in the Slender Anole: a Tale of Two Throats
Color us intrigued! In the world of Anolis lizards, the dewlap—a colorful throat fan used for communication—is one of the most iconic features. It’s been flaunted, flashed, and filmed in countless …
https://www.anoleannals.org/2025/06/01/dewlap-drama-in-the-slender-anole-a-tale-of-two-throats/
5 months ago
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Caiman crocodilus, the Spectacled Caiman
floridensis.com/2025/05/27/c...
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Caiman crocodilus, the Spectacled Caiman
Last updated Tuesday 27 May 2025. This is a shorter post because, to date, I’ve only encountered and photographed one non-native Spectacled caiman in Florida. Native to the lower portion of C…
https://floridensis.com/2025/05/27/caiman-crocodilus/
6 months ago
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A Three-Legged Lizard Mystery
www.anoleannals.org/2025/05/25/a...
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A Three-Legged Lizard Mystery
Anole Annals has featured a series of posts on three-legged lizards over the years (e.g., here and here). Now we need help. Some time around 2017, April Brown contributed a photo of a brown anole m…
https://www.anoleannals.org/2025/05/25/a-three-legged-lizard-mystery/
6 months ago
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reposted by
Jonathan Losos
Leah Shaffer
6 months ago
Here's a story about how breeding has smushed so many pet skulls that Persians and pugs resemble eachother more than their wild ancestors. Research from
@jblosos.bsky.social
🧪 🐕 🐈 💀
source.washu.edu/2025/04/copy...
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Copycat evolution
Biologist Jonathan Losos, in Arts & Sciences, has documented evidence of a kind of "copycat" evolution between extremely short-faced breeds of cats and dogs. Generations of intentional breeding have l...
https://source.washu.edu/2025/04/copycat-evolution/
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reposted by
Jonathan Losos
Jhan C. Salazar, PhD
6 months ago
I’m beyond proud to share that I’ve officially earned my Ph.D. and served as Student Marshal for the School of Medicine at WashU! Grateful to my advisor,
@jblosos.bsky.social
, my committee, and everyone who supported me. And now, on to the next chapter!
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USFWS and NOAA have a proposed rescinding the definition of “harm” under the Endangered Species Act. Presently, “harm” includes habitat modifications, such as those due to land-use change, invasive species, pollution. The new rule would be much more limited
www.federalregister.gov/documents/20...
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Rescinding the Definition of “Harm” Under the Endangered Species Act
The U.S. Fish and Wildlife Service (FWS) and the National Marine Fisheries Service (NMFS) (collectively referred to as the Services or we) are proposing to rescind the regulatory definition of "harm" ...
https://www.federalregister.gov/documents/2025/04/17/2025-06746/rescinding-the-definition-of-harm-under-the-endangered-species-act#open-comment
6 months ago
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<i>Anolis cannibalis</i>
www.anoleannals.org/2025/05/17/a...
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Anolis cannibalis
I live in Bermuda. Many years ago, my daughter and I witnessed a large male Graham’s anole devour a small female, same species. We were horrified as we had watched these particular individua…
https://www.anoleannals.org/2025/05/17/anolis-cannibalis/
6 months ago
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Understanding Animal Behaviour, a Non-Fiction Graphic Novel
www.anoleannals.org/2025/05/16/u...
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Understanding Animal Behaviour, a Non-Fiction Graphic Novel
I dislike textbooks. I still remember the dismay as an undergraduate student of spending all that money to buy hugely expensive textbooks. And if there was any sense of excitement on cracking the c…
https://www.anoleannals.org/2025/05/16/understanding-animal-behaviour-a-non-fiction-graphic-novel/
6 months ago
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reposted by
Jonathan Losos
Leah Shaffer
6 months ago
“The skulls of a Pug or a Pekingese and a Persian cat are more similar to each other than either is to their ancestors, the wolf and the North African wildcat,” said
@jblosos.bsky.social
.... “I don’t think anyone would have expected that.”
source.washu.edu/2025/04/copy...
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Copycat evolution
Biologist Jonathan Losos, in Arts & Sciences, has documented evidence of a kind of "copycat" evolution between extremely short-faced breeds of cats and dogs. Generations of intentional breeding have l...
https://source.washu.edu/2025/04/copycat-evolution/
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Anolis garmani, the Jamaican Giant Anole
floridensis.com/2025/05/06/a...
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Anolis garmani, the Jamaican Giant Anole
Admittedly, I’m playing a bit of an a-hole card by choosing Anolis garmani to be my first Anolis species on the current iteration of Floridensis. The Jamaican giant anole is a non-native (and…
https://floridensis.com/2025/05/06/anolis-garmani/
6 months ago
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Singapore National Parks Studying Impact of Introduced Brown Anoles (and the Greenhouse Frog)
www.anoleannals.org/2025/05/02/s...
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Singapore National Parks Studying Impact of Introduced Brown Anoles (and the Greenhouse Frog)
From the pages of The Straits Times: NParks monitoring whether brown anole, greenhouse frog pose threat to native species Nparks said that it is aware of the presence of the brown anole (left) and …
https://www.anoleannals.org/2025/05/02/singapore-national-parks-studying-impact-of-introduced-brown-anoles-and-the-greenhouse-frog/
6 months ago
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www.earth.com/news/our-lov...
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Our love for 'baby faces' reshaped cat and dog evolution
Persian cats and pug dogs evolved nearly identical flat faces due to human breeding. This convergence makes them look similar.
https://www.earth.com/news/our-love-for-baby-faces-reshaped-cat-and-dog-evolution/
6 months ago
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Looking for Simple Anole Marking Methods
www.anoleannals.org/2025/03/20/l...
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Looking for Simple Anole Marking Methods
Hello fellow anole enthusiasts! Last year I marked Green Anoles (Anolis carolinensis) in my backyard using a permanent marker to chart their population size. I’m looking to do a similar thing this …
https://www.anoleannals.org/2025/03/20/looking-for-simple-anole-marking-methods/
8 months ago
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Invasive Agama Decreases Number of Brown Anoles, Maybe Increases Disease Threat to Humans
www.anoleannals.org/2025/03/09/3...
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Invasive Agama Decreases Number of Brown Anoles, Maybe Increases Disease Threat to Humans
from the pages of Phys.org: How a turf war between lizards in Florida impacts mosquitoes and maybe human health by Denise Hruby Credit: Pixabay/CC0 Public Domain Mosquitoes might be the bane of a s…
https://www.anoleannals.org/2025/03/09/37414/
8 months ago
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reposted by
Jonathan Losos
Kelly Zamudio
8 months ago
ATX peeps...Mark your calendars!
@jblosos.bsky.social
is giving the Texas Biodiversity Center Distinguished Speaker Series talk at UT Austin on May 1, 2025 at 2:30 pm in NHB 1.720 (on the UT campus). Come talk cats!
live-cns-bdc.pantheonsite.io/.../cats-meo...
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Anoles of South America Part 4: Threats, Conservation, and the Path Forward
www.anoleannals.org/2025/03/02/a...
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Anoles of South America Part 4: Threats, Conservation, and the Path Forward
Now that I have reviewed the diversity of South American anoles north and south of the Andes, I will discuss conservation issues in this region. I will start by identifying some of the major threat…
https://www.anoleannals.org/2025/03/02/anoles-of-south-america-part-4-threats-conservation-and-the-path-forward/
8 months ago
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Time to Get to Work…Freedom Is Worth Fighting For
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Time to Get to Work…Freedom Is Worth Fighting For
As predicted, the Trump presidency presents an unprecedented threat to liberal democracy in America. The time for complacency and resignation is over.
https://open.substack.com/pub/perilous/p/time-to-get-to-workfreedom-is-worth?r=1m8blq&utm_campaign=post&utm_medium=web&showWelcomeOnShare=false
9 months ago
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The dodo bird is extinct. This scientist says she can bring it back.
The company she works for is betting millions it can realize a once-far-fetched idea of “de-extinction.”
https://www.washingtonpost.com/climate-environment/2025/01/25/de-extinction-beth-shapiro/
10 months ago
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#sicb2025
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SICB 2025: How Green Anoles Adapt to Local Climates
Green anoles (Anolis carolinensis) are everywhere in the southeastern United States, thriving in habitats that range from the balmy warmth of Miami to the cooler, more seasonal climates of Tennesse…
https://www.anoleannals.org/2025/01/26/sicb-2025-how-green-anoles-adapt-to-local-climates/
10 months ago
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wellbeingintl.org/shades-of-hi...
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Shades of Hitchcock's Film "The Birds"
Explore how crows rebounded after the West Nile Virus, adapted to urban life, and developed the ability to recognize and remember human faces. Learn about their intelligence, surprising behaviors, and...
https://wellbeingintl.org/shades-of-hitchcocks-film-the-birds/
10 months ago
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@jhancsalazar.bsky.social
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Jhan Carlos Salazar explores the peaks and valleys of evolution
Jhan Carlos Salazar has climbed great heights in his six years as a graduate student at WashU. Working with Jonathan Losos, the William H. Danforth Distinguished University Professor and director of t...
https://artsci.washu.edu/ampersand/jhan-carlos-salazar-explores-peaks-and-valleys-evolution
10 months ago
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reposted by
Jonathan Losos
Melissa
10 months ago
Archie, the cat aka “A-Train”
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reposted by
Jonathan Losos
Melissa
10 months ago
Archie in slow mo
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#sicb2025
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SICB 2025: Impact of Urbanization on Anole Locomotion
Urbanization has introduced man-made substrates like metal rods and plastics into anole habitats. So, how does this shift in the ecosystem affect the locomotion of anole lizards that rely on the in…
https://www.anoleannals.org/2025/01/20/sicb-2025-impact-of-urbanization-on-anole-locomotion/
10 months ago
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Fascinating! I didn't know any of this history.
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Fossils, Bison, & American Indians
How an 1870 expedition gave rise to the conservation movement
https://open.substack.com/pub/richardconniff/p/fossils-bison-and-american-indians?r=1m8blq&utm_campaign=post&utm_medium=email
10 months ago
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#sicb2025
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SICB 2025: Nesting Environments’ Impact on Growth
The local nesting environment that anole eggs experience—temperature, substrate type, or moisture content of the soil—can be important to embryonic development. However, there is a gap in research…
https://www.anoleannals.org/2025/01/18/sicb-2025-nesting-environments-impact-on-growth/
10 months ago
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Anole Bites Help Us Rediscover Rensch’s Rule
What Rensch (really) found there Rensch’s rule is one of the great macroevolutionary patterns studied by evolutionary biologists. It describes the positive association between male-biased sex…
https://www.anoleannals.org/2025/01/17/anole-bites-help-us-rediscover-renschs-rule/
10 months ago
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The Andes Are a Driver of Physiological Diversity in Anolis Lizards
When I was an undergrad student back in Colombia, I was trying to decide what to do for my thesis. In Colombia—or at least at my alma mater, Universidad Icesi—it’s mandatory to complete a thesis to…
https://www.anoleannals.org/2025/01/16/the-andes-are-a-driver-of-physiological-diversity-in-anolis-lizards/
10 months ago
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Los Andes como Motor de la Diversidad Fisiológica en los Anolis
Cuando era estudiante de pregrado en Colombia, estaba tratando de decidir qué hacer para mi tesis. En Colombia—o al menos en mi alma mater, la Universidad Icesi—es obligatorio hacer una tesis para …
https://www.anoleannals.org/2025/01/16/los-andes-como-motor-de-la-diversidad-fisiologica-en-los-anolis/
10 months ago
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Third Mexican Amber Anolis Lizard Discovered
Read all about it in the Journal of Herpetology: Abstract: Pre-Pleistocene fossils of Anolis lizards from the mainland of the Americas are exceedingly rare: only two specimens referred to a single…
https://www.anoleannals.org/2025/01/14/third-mexican-amber-anolis-lizard-discovered/
10 months ago
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“Cats: Predators to Pets” at the Field Museum
by Greg Mayer A traveling exhibit from the Muséum national d’Histoire naturelle (Paris) is now on display at the Field Museum of Natural History in Chicago. Entitled “Cats: Predators to…
https://whyevolutionistrue.com/2025/01/11/cats-predators-to-pets-at-the-field-museum/
10 months ago
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