Thats the funny thing I always see.
EU players will never be satisfied with their region unless literally every single mammal and habitat suitable bird will be added.
Its not that i want every animal i just want variety to build for.
Its not a chamois for a third goat or the roe deer as the 5. deer im wanting but things that actually are different from what the region currently has to offer.
I have no problems with using stand ins like the beaver, but especally when there are no suitable stand ins then thats just meh.
+ its not like the animals would be redundant in the greater game either, as most of them either cross over into other continents or are something new like our first stork, groose, marten, squirrel, duck and in many cases either the nominal species or/and the most sensible choice.
The white stork is the stork with the largest range and is only rivaled in its icon status by the marabou, mallard ducks are THE duck, the capercallie is the largest grouse, the european polecat would bring a unique body type while also being a stand in domestic and potentially the most colorfull, the alpine marmot is the largest marmot and one of the largest rodents, etc,
Only martens and squirrels are reasonably outclassed by other variants with a larger SEA squirrel and the more colorfull yellow throated marten, but even then red squirrel, beech and pine marten all got arguments to be made for their inclusion and would finally bring a dedicated climber to europe.
This isnt just another deer or bear situation like for example NA but there are still many unqiue and iconic animals that europe has to offer.
NA also got some interesting additions left like the NA porcupine, roadrunner, california quail, roseate spoonbill and a few more but for some reason they are just very rarely talked about cause they are seen as niche additions, which is a shame imo.
In general we are at a point where i care less about where the animal comes from as every continent even South america has a decent enough roster to build varried areas, but more about if the animal would add something cool and interesting in general and squirrels, ducks, storks, a large grouse, a more ferret like mustelid and a few more just happen to have their imo best choices living in europe.