The Breeding-back Blog

"Breeding-back" aims to restore or immitate extinct animals by selective breeding. This blog provides general information, the facts behind myths and news from various projects.

Sunday, 10 May 2026

Domestic bull skeletons vs. the Prejlerup bull

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I t took me a few weeks to finish it, but I finally have finished the sketches of what the skeletons of several aurochs-like domestic bu...
1 comment:
Tuesday, 21 April 2026

Skeletal sketch of a Tauros cattle bull

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G razelands Rewilding posted this Tauros cattle bull on their Instagram page a while ago. I strongly suspect that this individual is he...
3 comments:
Thursday, 9 April 2026

Using AI for aurochs reconstructions

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AI generated images are not my taste at all, but I have been experimenting with ChatGPT lately. Precisely, I used it on my aurochs recon...
1 comment:
Wednesday, 18 March 2026

Realtalk: will the aurochs ever come back?

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B ack in my teenage years, I was very much into Mesozoic dinosaurs. It changed in my late teens and shifted towards recently extinct ani...
8 comments:
Sunday, 1 March 2026

Two new aurochs head busts based on actual skulls

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R ecently I finished two aurochs head busts I have been working on over the last couple of weeks. They represent the Ilford (= London) s...
2 comments:
Sunday, 15 February 2026

The wisent hybrid origin hypothesis is outdated

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T races of hybridization among closely related species have been found everywhere it was looked for, including the genus Homo . Bovines ...
Tuesday, 20 January 2026

Did the wisent evolve because of humans?

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F or this post, I created the new post category “wild speculations”, because it is indeed a wild speculation. Some specie...
3 comments:
Friday, 26 December 2025

Aurochs anatomy revisited

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I n the latest post, I reviewed much of the ancient and historical aurochs depictions and what they tell us. Here are s...
1 comment:
Sunday, 7 December 2025

What ancient and historical depictions of the aurochs tell us

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When trying to infer the morphology of the aurochs from all available evidence, we do reach a point where comparisons wit...
3 comments:
Tuesday, 11 November 2025

Flaws and inaccuracies in my aurochs reconstructions and what we do not know

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I did several dozens, perhaps roughly one hundred, aurochs reconstructions since I got into this topic in 2011. Some of t...
7 comments:
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Daniel Foidl
My major interests always have been extinct animals, from dinosaurs to Pleistocene megafauna and more recent extinctions. Besides that I am interested in evolution, genetics and ecology. I am also an amateur animal artist, making drawings and models mostly of extinct animals.
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