Old worldbuilding game
 

Played it back in the 90's
We created custom build herbivores or carnivores and let them roam. We were receiving text reports of their well-being.
PC windows

That's all I recall

Check SimLife.

And SimEarth is probable second candidate. :)

Those two aren't the one I'm looking for but they're interesting!

Well, I can guess also Evolution, but after that my ideas are pretty dry, if you cannot remember anything else. :)

I suppose you are not talking about these games?

• Wolf;
• Lion.