An orgle is a guttural vocal sound produced by a male alpaca or llama during copulation. Orgling helps induce ovulation in the female. The male will typically orgle for for the duration of the mating, up to twenty minutes. Can be both a noun and a verb.
"I knew that the sire had finished with the female when he ceased to orgle."
"The orgling was the strangest sound I ever heard, like a horse trying to hum, scream and gargle all at once."