Why is today's lunar eclipse called a Beaver Blood Moon eclipse?

Tuesday's total lunar eclipse got its name from Algonquian languages once spoken by Native Americans in the New England territory. It's coinciding with what they called the 'Beaver Moon' – a moniker for the November full Moon. As Earth casts shadow completely on the Moon, it dims the Moon's colour, giving it a reddish hue, hence the term "Blood Moon".