We have a distinct social order. Either a male or female can maintain herd dominance. Full grown, llamas average between 250 and 375 lbs., and alpacas from 100 to 175 pounds. In North America we enjoy a long life where we have been know to live as long as 35 years. From conception to birth, our full-term is even longer than that of human babies, about 345 days.
Twins are rare.
We chew cud and can spit very well. However, this is an insult reserved primarily for our own kind. Spitting occurs only after other expressions of displeasure have not been heeded. We eat a variety of hays, often a mineral supplement, and salt. Although we are in the camelid family, we need fresh, clean water and consume, on average, several gallons per day.