I'm not sure how useful is the classification by country for plants
and animals using categories.
1) There are many plants and animals which can be found in most
countries in Eurasia and Africa, for example. That would mean
a hundred or two of categories.
2) In an average country, there are somewhere between 3-10,000 species
of plants. Some tropical countries (like Brazil) have more than
25,000 known species of plants and 5,000 species of animals. I can't
see how such an immense category can be useful or maintainable.
An alternative would be the usage of lists, but those would also
potentially be very large.
Any suggestions?