白大角羊 (Ovis dalli) 又稱為「戴爾羊」、「薄角羊」，是一種生長在美國阿拉斯加、加拿大育空和卑詩省高山草原的野生綿羊。牠們的體色為白色和淡棕色，長有黃棕色的角，兩性有明顯差異：雄性的體型比雌性大許多，角也更粗、更彎。雄性身長介於 1.3 至 1.8 公尺，體重 73 至 113 公斤；雌性為 1.3 至 1.6 公尺長、46 至 50 公斤重。
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Ovis dalli
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dall-sheep
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Animal Facts
When male Dall sheep clash horns, the sound can be heard 1km away.
Dall Sheep are known to travel 10 miles out of their way to visit mineral-rich areas where they lick the soil to acquire nutrients they don't get from their grazing diet.
Male Dall sheep can be aggressive when competing for females and have been known to ram each other off cliffs.
The age of a Dall sheep can be estimated based on the growth rings on their horns.
During the winter months, Dall sheep feed on frozen sedges in the snow and lichen from rocks.
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