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Ambrox @ambrox.bsky.social · 07/07/2026

I got some lifers and good photos on this year’s Montana trip!

A picturesque black and white warbler sitting amongst the cedar branches, a lifer for me!

A sneaky prairie rattlesnake mid-tongue flick

An eastern kingbird perched on a barbed wire fence

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Ambrox @ambrox.bsky.social · 11/06/2026

JFC this doe has been harassing my dog and showing her disproval at me by stamping her hoof and mock charging my dog (who is unharmed, save for her wounded pride) She definitely has a fawn nearby but she refuses to show us her baby yet!

Mama doe refueling by draining one whole gallon of bird seed, you know, for fun.

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Ambrox @ambrox.bsky.social · 11/06/2026

Therapist: so, how have you been doing? Me: oh, pretty good; I have a new bully now! T: huh?

Intimidating picture of a bloodthirsty deer at night

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Ambrox @ambrox.bsky.social · 05/06/2026

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 lilac-breasted roller, credit to Laya Clode.

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Ambrox @ambrox.bsky.social · 27/05/2026

Surprisingly enough, from what I’ve seen, they (Casteroides) didn’t have the flat tail! They were bear sized, but had more of a muskrat style tail. Hard to imagine something that size also being a habitat engineer, doubtless they also had similar lifestyles to beavers today.

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Ambrox @ambrox.bsky.social · 27/04/2026

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 left

A male rose-breasted grosbeak on a feeder

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Ambrox @ambrox.bsky.social · 18/04/2026

Sorting microfossils comes with so many little joys, including making a category solely for “turtle toes”

A bunch of bones sorted into a plastic bin, labels include “turtle toes”, “crocodilian teeth”, and “fish bones/verts”

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Ambrox @ambrox.bsky.social · 21/03/2026

Not me crying over some cute bats just flappin’ around 😭

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Ambrox @ambrox.bsky.social · 11/03/2026

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.

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Ambrox @ambrox.bsky.social · 13/10/2025

A mischievous archaeopteryx has appeared!

An abstract looking archaeopteryx on a plain green background

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Ambrox @ambrox.bsky.social · 11/08/2025

Megacerops was a large ungulate from the White River Formation (38-33 million years ago) of the Midwest in the US. They resembled Rhinoceros, but had bony nasal horns that were covered by skin, not a keratin horn! #paleoart #fossilart

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Ambrox @ambrox.bsky.social · 22/07/2025

Mega Dragonite Done in procreate as an unintentional 1hr speed paint #pokemon #dragonite #megaevolution #pokemonAZ

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Ambrox @ambrox.bsky.social · 21/07/2025

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.

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Ambrox @ambrox.bsky.social · 18/07/2025

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 Voaden

A “before” image of the Primobucco specimen.

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Ambrox @ambrox.bsky.social · 14/07/2025

Here are the answers to today’s #findthefossil! Some of the suspicious looking bits are actually dead sagebrush leaves. Included in the mix here are turtle bits, various dinosaur chunks, and maybe some crocodilian bone pieces. I’ll try to post some more of these challenges in the future!

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Ambrox @ambrox.bsky.social · 13/07/2025

Here’s a game for y’all! I have a picture with fossils in a “float” deposit, where they’ve been washed out of the rock and precipitated out in the ground in the hell creek formation! Let’s see how many you can spot! I’ll post the answer in a little bit! Instead of #findthatlizard , #findthatfossil !

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Ambrox @ambrox.bsky.social · 11/07/2025

It’s time for: a creature spotlight! On the ranch where the crew and I dig every year, there are harvester ants that gather and sort small sediment for their hills! They are known to grab small microfossils (like teeth) and small bits for their hills, including bones!

An overhead view of a harvester ant hill, which includes bones of a small animal

Another harvester ant hill with abundant white gypsum crystals included

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Ambrox @ambrox.bsky.social · 09/07/2025

I’m alive!! I had the wildest field session this year, including a brush with a wildfire and some cool wildlife! Stay tuned for photos of the stuff I found on my dinosaur dig this year!

A plume of a distant wildfire in makoshika state park

A prickly pear cactus mid bloom in Montana

A prairie rattlesnake, mid-shed, perched on a dry creek bed bank in Montana

A Least Chipmunk in the brush in Montana

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Ambrox @ambrox.bsky.social · 04/06/2025

Gonna be cleaning some scraggly T. rex bits to sell in my shop at some point. Keep an eye out! Hopefully I can get them listed before I head out on this year’s trip! Unfortunately, these bits aren’t worth salvaging as an entire specimen due to how much weathering had been done to it. #hellcreek

The majority of the bone fragment haul. Also included in the picture is a Primobucco cast I painted myself and a doormat that desperately needs to be painted.

A closeup of the nicer rex bits, toothbrush for scale

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Ambrox @ambrox.bsky.social · 12/05/2025

Bothriolepis on the brain

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Ambrox @ambrox.bsky.social · 26/04/2025

A micro texture on a placoderm fish from presumably the red hill deposits in PA. So cool to see these up close!

The micro texture on a jawless fish from the Devonian of Pennsylvania.

Zoomed out on a jawless fish fin covering from the Devonian of Pennsylvania.

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Ambrox @ambrox.bsky.social · 10/04/2025

A second bird! Likely a larger waterfowl like presbyornis. Sources from the green river formation.

The keel (chest), humeri (upper arms), and ribs of a large bird from the green river formation of Wyoming, ~50 mya

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Ambrox @ambrox.bsky.social · 07/04/2025

I’m moving! I’ve put up a limited time 20% off sale to help get some stock moving in my €tsy shop! Here’s a brief look at my items:

Cretaceous gar scales in a floating frame

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Ambrox @ambrox.bsky.social · 13/03/2025

Not every day you see an allosaurus skull rubber banded up for repairs 😂

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Ambrox @ambrox.bsky.social · 05/03/2025

A pachyceohalosaurus I drew while at #paleofest! It was a blast meeting and seeing so many people I look up to! This guy is based off the skull model in the Burpee Museum in Jane the Juvenile Rex room!

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Ambrox @ambrox.bsky.social · 26/02/2025

Spherotholus and Kulindadromeus, Done in inks and marker. I’m available to do others for commissions! #paleoart #ink

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Ambrox @ambrox.bsky.social · 20/02/2025

Steamed owlette anyone? (In all seriousness, I didn’t get the steam up under this gorgeous eastern screech owl. I’ve been correcting the pinnate feathers on this guy) #museum #taxidermy

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Ambrox @ambrox.bsky.social · 14/02/2025

For an early #fossilfriday, here’s a timelapse of me working on a piece of triceratops frill!

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Ambrox @ambrox.bsky.social · 08/02/2025

It’s time to groom and tidy up a hawk! This guy had paint on his tail feathers! Hopefully a good swabbing and a small amount of steam will help him look like new.

Red tailed hawk taxidermy with paint on its tail

Red tailed hawk taxidermy with terribly aged paint on its toes

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Ambrox @ambrox.bsky.social · 25/01/2025

Little late for #fossilfriday, but here’s a finished Messelornis leg from the green river formation! The guy who worked on this previously did me no favors by breaking the femur and tendon remains, hence the bedraggled appearance.

Zoom in of bird leg slab and counter slab

Detail shot of tendon fibers from the bird leg

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Ambrox @ambrox.bsky.social · 14/01/2025

For #trilobitetuesday, here’s a fancy lil Morocops from the Devonian of Morocco that is in my collection!

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Ambrox @ambrox.bsky.social · 04/01/2025

*drumroll* it’s a leg, finally! I’ve finished this little green river bird leg, now onto the counter slab, which looks to have some scant feather preservation 👀 #museum #fossil

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Ambrox @ambrox.bsky.social · 04/01/2025

My first bird piece isn’t exciting to look at, but it’s probably an arm bone overlying where the flight muscles attached, known as the keel, on the chest. Approx. 50 million years old from the green river formation! #fossilfriday #museum

Before preparation picture of a bird fossil

After preparation picture of a bird fossil

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Ambrox @ambrox.bsky.social · 01/01/2025

Woooo microscope assembly time!!

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Ambrox @ambrox.bsky.social · 17/12/2024

The museum I work at was able to acquire some #greenriver bird slabs! Here are the first looks: a solo wing and a leg with a counter slab! There’s also a full body bird in the lot as well. I’ll keep y’all posted on what those look like!

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Ambrox @ambrox.bsky.social · 06/12/2024

For #fossilfriday, I have a triceratops pelvis piece, likely part of the illium that I drilled and split myself.

Rock mid-split that has a fossil bone on it

Finished bone piece with leaf at the top

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Ambrox @ambrox.bsky.social · 29/11/2024

For this #fossilfriday, I have a piece of what is assumed to be a Triceratops pelvis bone - we aren’t too sure what part since it’s so broken and incomplete, but it has gorgeous texture! I still have some fragments to match onto this specimen, but it’s nearly done!

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Ambrox @ambrox.bsky.social · 26/11/2024

I’ve listed more petrified wood on my shop! I’ve collected all these pieces straight from the Hell Creek.

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Ambrox @ambrox.bsky.social · 15/11/2024

Just whipped up a skeletal - a first for me - of the turtle that we are likely working on in the lab: Toxochelys moorevillensis! I’m not certain about the sizing and ID of the piece, but this is my best guess. I’ll update on what this could be otherwise! #turtle #cretaceous #cooncreek #fossil #paleo

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Ambrox @ambrox.bsky.social · 08/11/2024

Hey guys!!! Go to my kofi for a free coloring book page!! Have one on the house since everything sucks and having a coloring book page is honestly always a fun way to relax. Here’s the watermarked version: #coloringbook #trex #dinosaur #paleoart #paleontology #paleo #hellcreek #cretaceous #mesozoic

A watermarked coloring book page of a Tyrannosaurus rex

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Ambrox @ambrox.bsky.social · 31/10/2024

It’s a #throwbackthursday with a special piece that is Halloween themed!

A spooky trail cam style rendered image of a Quetzalcoatlus devouring a hadrosaur corpse.

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Ambrox @ambrox.bsky.social · 24/10/2024

Working on this currently unidentifiable marine turtle bone, possibly humerus, from the Coon Creek Fm in Tennessee, which is late Cretaceous. These guys were definitely on the menu for the larger predators like mosasaurs or other marine reptiles.

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Ambrox @ambrox.bsky.social · 22/10/2024

probably should go through and update these older coloring pages, since this one is already 2 years old. Anyways! Here’s my coloring page from a series I call “weirdosaurs” where I depict the stranger looking animals of archosaurian lineage. Stay tuned for more pages! #paleoart #paleontology

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Ambrox @ambrox.bsky.social · 19/10/2024

Oh my god there’s a tiny crab claw in this clump of rock!! So cute!!

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