We aren't really quite sure what purpose llamas actually serve in the world. Are they valued for their fur/hair? Their meat? Can you milk them? Do they lay eggs? Are they run in races? Who knows!
But given their large, fuzzy, ungainly appearance halfway between horse and goat, we do know that they make delightfully cute greeting card critters. Like the pair of big, furry, scarf-wearing llamas pictured on this hugely colorful and epically fun B-Day card. So, don't massively over-think these oversized animals' purpose or name, simply select and send out this wonderful and wacky greeting and you'll have nailed the true meaning and spirit of "Happy Birthday!"