Editing Dall sheep (section)

==Description==
''O. dalli'' stand about {{convert|3|ft|m|1|adj=on|abbr=on}} at the shoulder. They are off-white in color, and their coat consists of a fine wool [[Down hair|undercoat]] and stiff, long, and hollow [[guard hair]]s. Their winter coats can be over {{convert|2|in|cm|0}} thick. ''O. dalli'' can live to be 12 to 16 years of age.<ref name=npsAbout>{{NPS|url=https://www.nps.gov/articles/about-dall-sheep.htm|article=Dall Sheep|accessdate=2021-10-09}}</ref>

''O. dalli'' are [[Sexual dimorphism|sexually dimorphic]], which means rams and ewes look different. Rams are larger than ewes and typically weigh between {{convert|160|and|180|lb|kg|-1}} at maturity. Ewes weigh approximately {{convert|100|to|110|lb|kg}} on average. During the winter, adult sheep may lose up to 16% of their body mass, and lambs and yearlings as much as 40% depending on winter weather severity. ''O. dalli'' begin growing horns at about two months old. Ewes have small, slender horns compared to the massive, curling horns of rams. Young rams resemble ewes until they are about 3 years of age. At this point, their horns begin to grow much faster and larger than ewes' horns.<ref name=npsAbout/>

Adult male ''O. dalli'' have thick, curling horns. Adult males are easily distinguished by their horns, which continue to grow steadily from spring to early fall. This results in a start-and-stop growth pattern of rings called [[Annulus (zoology)|annuli]]. Annuli can be used to help determine age.<ref name='adfg-dallsheep'>{{cite web |title=Dall Sheep (Ovis dalli dalli) |url=http://www.adfg.alaska.gov/index.cfm%3Fadfg%3Ddallsheep.main |website=Alaska Department of Fish and Game |access-date=16 March 2021}}</ref>