The little horse Calippus regulus, with four manes! Members of the genus Calippus were square-snouted grazers in the tribe Protohippini that lived across North/Central America during the #Miocene. The hair is speculative, inspired by Black Wildebeest. #paleoart #sciart #YearoftheHorse #cenozoic

Pachyaena gigantea #paleoart #mesonychidae

Welcome back to another year of #marchofthemammals2026 ! We'll be going from formation to formation again, going from gliding mammaliaformes to rotund early elephants to Appalachian red pandas, and everything in between. I hope to see y'all participate!

As the #YearoftheHorse begins, I will share an overview of my recent journey through reconstructing prehistoric horses. For such an important, beloved, and fascinating lineage, there isn't an abundance of paleoart of them (and very little that diverges from established tropes)🧵. #paleoart #sciart

Perissodactyls of the Houze Prairie (at least within the known world). A lot of Hipparionins, one Equus species, a Rhino and a giant Chalicothere. All species are creations of @talesofkaimere.bsky.social for the fictional world of #Kaimere, as seen in today’s episode documenting its horses. #specevo

Happy Chinese New Year! As we enter the Year of the Horse, we meet the equids of Kaimere. There are familiar horses in the known world, but in the realms beyond, many are so strange they could hardly be recognized without close inspection. Link: www.youtube.com/watch?v=qT1E...

Wildlife management is difficult, doubly so with large carnivores (partly because it’s also people management). No different when the “panther” in question is a 200+ pound non-mammalian Cynodont on a subantarctic island. A modern scene from my Kerguelen spec-evo project. #specevo #tritylodont

Perissodactyl Harvest Opportunities by @dynamoterror.bsky.social: docs.google.com/document/d/1...

A bit late but here are my flocking drawings from last Friday: Incisivosaurus, Haikouichthys, Denversaurus, and Chasmataspis #paleostream #paleoart #sciart

Our belated #Cenozoicrewind2025 wrap up! As always thanks for following along, here's to a big 2026! #paleoart #sciart #fossilfriday

Certified Little Guy™

Horses of some familiar colors:

Something that brought me a smile recently, the Field Pansies in my yard have returned. In this little slice of suburbia, these native violets briefly appear and bloom each year as winter transitions to spring. #spring #flowers #botany #nativeplants

How it started vs how it was when the French found it Quick sketches of some thyreophorans for a WIP personal speculative-evolution project, focusing on the ecosystems of an un-sunken Kerguelen plateau. #specevo #dinosaurs

Excited to see these results published! For anyone who has been curious about what is going on with canids in the Gulf Coast, and what they are, this is an excellent and comprehensive assessment: esajournals.onlinelibrary.wiley.com/doi/10.1002/...

A new species of scrub-ox joins North America's Ovibovine diversity during the Pleistocene! Formerly classified as a species of Euceratherium, it is now known as Speleotherium logani.

The ontogeny of Smilodon fatalis- illustrating the unique life history of a saber-toothed cat's development.

More late summer gems from the North Cascades

"Pat, why do you carry that ridiculous 600mm lens on long hikes?" Buddy, I can see mountains reflected in the eyes of a trailside pika.

An overview of perissodactyl natural history in the known world and beyond: www.youtube.com/watch?v=2BeM...

Quick sketch of everyone’s beloved Merychippus, though not as it’s often depicted. These and other early Equines were far-removed in phylogeny, morphology, and ecology from the genus Equus, and thus, why give it a mane or rhinarium-less snout? #YearoftheHorse #miocene #paleoart #sciart

🐎Protohippus gidleyi lived millions of years ago in Alabama! This three-toed, ancient horse shows early adaptations to grasslands. Its worn teeth helped grind plants, and its fossils tell the story of horse evolution in our state. #aumnh #auburnuniversity #YearOfTheHorse #FossilFriday

A selection of Pleistocene Perissodactyls:

Morphological assessment of the Common Barn Owl Tyto alba (Strigiformes: Tytonidae) supports three species: mapress.com/zt/article/v...

Some mammals i thought I posted along with a new one: Arctocyon, Potamotherium, Puijila, and Longirostromeryx #sciart #paleoart

Fire may draw birds to previously burned areas where they disperse seeds. This cycle helps plants rise from the ashes, revealing a complicated relationship between fire, plants and wildlife.

Slightly delayed flocking #Paleostream sketch, a bull Platycerabos confronting a particularly aggressive Sage Grouse on the open plains of Nebraska. Platycerabos was an enigmatic bovine known from one strange skull, and little-acknowledged since the 1930s. #pleistocene #paleoart #bovid

One day I shall return and complete this one -.-

A selection of the paleo perissodactyls from both Earth and Kaimere we will meet next month!

Trying to post my flocking sketches more often, this time we did Platycerabos, Mixosaurus, Tetrameryx, and Hyperodapedon #paleostream #paleoart #sciart

Tuskoneers! #paleoart

I highly recommend any scientific researchers to consider commissioning JW. Not only is he extremely knowledgeable in many groups from fish to mammals to inverts, he is also one of the most prolific paleo artists with all of his Wikipedia illustrations. He is also a really genuine and great person!

I'm finally putting up a commission sheet since I've been wanting to for a while! I mostly specialize in fish and mammals, but I can draw almost anything. Contact me so we can figure out how to work together! #commissions #paleoart #sciart

Very happy with how the commission turned out. I encourage you all to give Dynamo a follow. :D

One of the greatest prehistoric-ungulate artists of our time, every piece is stunning!

Pleistocene steppe bison Bison Priscus. It inhabited Europe, Asia, and North America until the early Holocene and is the ancestor of modern European bison and American bison. I'm not sure if it's noticeable, but I was inspired by ancient images of bison and Altamira and other caves.

A drawing of Allodelphis woodburnei, a marine Platanistoid (cousin of South-Asian River Dolphins) from miocene California. It and its close relatives had flexible necks and large fins, making them slow yet agile hunters of small prey. A commission from @shamublackfish.bsky.social #paleoart #sciart

Though megathere sloths were once among the dominant large herbivores, most of them went extinct with the most recent major faunal turnover 1.5 million years ago. In the western reaches of southern Arvel, a relic of a lost age soldiers on. Link: www.youtube.com/watch?v=jU1m...

Hiya, I have 4 more school fact file sheets for #FossilFriday: #Tianyulong, #Darwinopterus, #Oregramma, and #Caytonia! These are really relaxing to do, and I plan on doing more plants next! I hope you like them! #paleontology #paleobotany #paleoart #sciart #scicomm #schoolwork #publiccommunication

Quick sketch of the newly described Clethrionomys sibiricola, the early-Pleistocene ancestor of the Northern Red-backed Vole (Clethrionomys rutilus). Its fossils (several teeth and a partial mandible) are known from Western Siberia. #sciart #paleoart #pleistocene #vole

The Last Aurochs

Anchitherium sensibly responding to the current situation. Btw, a lot of early horses seem to have big preorbital glands and more people should draw that.

I'm making a series of infographics at the moment for some school groups, and, honestly, I'm really enjoying it!!! They're learning about paleontology, and I was asked if I could provide some images of extinct plants and animals! Here are the first few: #paleoart #scicomm #education #paleontology

Tonight’s flocking-together #Paleostream was nothing but synapsids, three gorgonopsians in a row (Dinogorgon, Viatkogorgon, and Njalila) and then the Pleistocene South American horse Hippidion. #paleoart #sciart #permian #pleistocene

#Cenozoicpaleo2025 Meet Dynamognathus robertsoni! #paleoart #sciart #vectorart

Illustration of the African middle-miocene Elasmotheriine Victoriaceros kenyensis, made for the Victoriaceros Wikipedia page. The few existing reconstructions of this rhino give it a prominent nasal horn, while I depicted it with a large callus-like growth. #miocene #paleoart #sciart

A scene from middle Miocene Slovakia: a Pseudocyon rears up in surprise as a defensive mother Parvorhinus charges it, protective of her clueless calf. Parvorhinus, named a few years ago, was one of the smallest rhinos of the #Miocene and makes for a fun first sketch of 2026! #paleoart #sciart

This is not a model. This is a "fossilised" taxidermy of a Woolly Rhino, discovered in Starunia mine in Carpathian Poland (now Ukraine) in 1929. Dating to the Pleistocene, its exquisite preservation is owed to a mixture of brine, oil and clays. 🧵

Getting back into the swing of ungulates after a bit, here are four rhinos: Parvorhinus, Uintaceras, Megacanodon, Aprotodon qiui #paleoart #sciart