Ambrox

@ambrox.bsky.social

She/they. A paleontologist who makes paleoart and overshares on the internet. All opinions are my own. My shop: https://ambroxrocks.etsy.com My kofi: https://ko-fi.com/ambrox

Just returned from a daytrip to a Cretaceous site in Tennessee! We have some exciting finds to work on at the museum soon! We found isolated pieces of shark, sea turtle, plesiosaur, mosasaur, fish, crab, and even crocodile!

A large elasmosaurid vertebra in the dirt with a GSA scale beside itThe dig site locality, sporting coyote and animal tracks

Oh to my surprise when someone comes in asking about bones and pulls out a bunch of Pleistocene beaver remains! I hope there’s the rest of the skeleton still in the riverbank!

One of my favorite things about mammals having to have exactly 7 neck vertebrae, no more, no less, is that to make your neck a different length, you have to change the length of your vertebrae. This has gotten very silly in dolphins. 📷Tursiops truncatus: macroscopic solutions, earth. com

7 vertebrae that are mostly thinner than pancakes. They look like normal vertebrae that got sat on.A bottlenose dolphin at the side of a tank, perched and arching its back so its tail and nose are in the air. The distance between its flippers and eyes is not that far. I guess its neck really is short in there.

And another one!! A Primobucco has been finished after 5 collective months of scraping! I’m so happy how this one turned out, I’m sincerely hoping I can work on more of these Green River birds in the future, given we can get ahold of any. Also pictured is a modern relative of Primobucco.

A zoom in of a fossil bird headA fossil bird next to a scale in inchesA lilac-breasted roller, credit to Laya Clode.

"Scientists don't want you to know-" Buddy there are so many things I, as a scientist, want you to know and the only thing stopping me from writing more papers and posts about it and then starting a podcast to tell you even MORE things is that I am limited by hours in the day

Today’s been great for pictures of migratory birds here in my backyard! I’ve seen indigo buntings, a rose-breasted grosbeak, and a scarlet tanager so far!

Two indigo buntings perched on a branch, male to the right and female to the leftA male rose-breasted grosbeak on a feederA handsome male scarlet tanager

Coon creek dig this past weekend was quite nice! These shells are approximately 76 million years old, but retain their original shell material!

A tabletop with fossil shells littered around. They aren’t fully cleaned yet.

Here are some of the fossil finds from this year’s dig season: the crown jewel being a Tyrannosaurid tooth. Also shown are a Metasequoia cone, a fossil tendon, a crocodilian tooth, and some freshwater ray crushing teeth, plus some amber!

A Tyrannosaurid tooth, with serrations and partial root. Next to a scale of one inch increments.A metasequoia seed cone sitting next to a dinosaur tail tendon fossil. Next to a scale of one inch increments.A collection of microfossils, from left to right: a crocodilian crushing tooth from a brachychampsa, a bowfin fish jaw section, two freshwater ray teeth from Myledaphus, and a vertebra from a gar fish. Next to a scale of one inch increments.A chunk of Amber, crystallized from tree sap.
Next to a scale of one inch increments.

My first big bird project is done! I’m excited to show you all this bird that took me so long - at least a few months! This guy comes from the green river formation and is the most common bird found there: Primobucco mcgrewi.

Full slab view of a Primobucco, a type of roller-like bird, from the green river formation.Zoom in of the head of a Primobucco, a type of roller-like bird, from the green river formation.Image of a modern roller bird, the long-tailed ground-roller. 
© Nigel VoadenA “before” image of the Primobucco specimen.