#Wikipedia has articles about all kinds of cats, dogs, horses, sheep, goats and chickens. Commons has pictures about all kinds of cats, dogs, horses, sheep, goats and chickens.
Many of those articles or pictures are about a particular kind of animal, a breed. There is so much information that can be added about all these breeds. Where did they originate, are they recognised in specific countries, what colours and patterns exist...
Wikidata knows about more breeds than any Wikipedia. Widar was used to add statements based on the content of categories about breeds from several Wikipedias. It is much easier to be inclusive in Wikidata and, it is much easier to complete the sum of all such knowledge in Wikidata as well.