NCDahlia there are some further rules as well. For example, a bird with just a one word name would be abbreviated with the first four letters. So Dunlin would be DUNL. If the name is three words, it’s the first letter of each of the first two words and two letters from the third, so Yellow Bellied Sapsucker would be YBSA. Four words in the name, the first letter of each…
I break the rules in labeling dahlias, because I always start with a 2 letter hybridizer code if there is one, so sometimes it makes sense to include a bonus letter. (Or a number, like HHS16 for Hollyhill Sweet 16).