Distribution is the biggest difference. You'll find Dall sheep from northern BC and Alberta thru the Yukon into Alaska, and bighorn further south from northern Mexico up to southern BC and Alberta. Dalls further north are primarily white. further south in northern BC and Alberta they can be white or darker in color like a bighorn, the darker ones are called stone dalls or just stone sheep. Bighorns on the other hand are mostly brown with a white rump. You'll hear about horns and snouts having differences, and if you have them together at a zoo or w/e I'm sure there are those differences, but in the wild where Dalls and Bighorns occupy completely different regions the big difference is where you are seeing them... dalls are north and bighorns are south.
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The main difference between longhorn sheep and bighorn sheep is in their horn shape. Longhorn sheep have long, sweeping curved horns, while bighorn sheep have large, curved horns with a distinctive "big" curl. Additionally, bighorn sheep tend to be larger in size compared to longhorn sheep.
Big horn sheep typically live for 10-15 years in the wild, although some have been known to live up to 20 years in captivity. Various factors such as availability of food, predators, and disease impact their lifespan.
The typical time between births of twin sheep is ten to fifteen minutes. It has not been unheard of however, for the second to come five to six hours later.
It is not actually a horn, but a tooth, and it can grow up to 9 feet long (no joke)
the bighorn has big horns and the longhorn has long horns
2 through 4 feet long