So far I found some on Genesis in the snow biome

These love the Chalk Hills in Valguero. They constantly feud with the deinons there so keep an eye out & be ready to pick them out with a flyer so they don’t immediately die

I've had a lot of luck with flat grassy areas on Valguero

Just look for a mound of dirt on the ground; the burrowbuck (or burrowdoe!) will be nearby

PastelGothPower

You can encounter them in open plains on several maps i just dont have an exact list of maps

They spawn in the big meadows in korinthos on astraoes i saw some at 58.6 lat and 21.3 long. Sadly I can't tame it 😢.

On Val you can find them around Lat 74.2 and Long 87 just look for their burrowss. They are mean and babies seem to be as well.

I happened to come across a burrow but with 2 Trex wondering about which I despatched,the adult burrowbuck got killed, I acquired one baby and just tamed the second one, obviously from the same litter and about to cryo it after taming and another Trex came from nowhere and wasted the 2nd baby.

They seem to like open areas and areas along certain beaches. Keep an eye out for their massive burrows. Their antlers also glow at night so that may make them easier to spot

If they have a baby they will try to murder you and you tames stay safe :D