In Australia, there are several prominent clubs and organizations dedicated to the Australian Stumpy Tail Cattle Dog (Stumpy Tail). Here are some of the most notable ones along with their URLs:
https://dogsaustralia.org.au/members/breeds/breed-standards/Australian-Stumpy-Tail-Cattle-Dog
ANKC is the national governing body for purebred canine affairs in Australia, including breed standards and registration for the Australian Stumpy Tail Cattle Dog.
https://www.australianstumpytailcattledog.net/
This club is dedicated to the promotion, preservation, and welfare of the Stumpy Tail breed in New South Wales, Australia.
https://www.acdsocietynsw.com/
While not specific to Stumpy Tails, this society is involved with Australian Cattle Dogs, which includes the Stumpy Tail variety.
Please note that the availability and content of these websites may change over time, so it's a good practice to verify the information on their respective websites for the most up-to-date details.
For information about the Australian Stumpy Tail Cattle Dog on Wikipedia, you can visit the following link:
https://en.wikipedia.org/wiki/Australian_Stumpy_Tail_Cattle_Dog