It can still exist or be gone. There are at least 4 more that exist and 3 that don't exist that have not yet been mentioned.

Incidentally, in my original post, the over 20 figure only referred to existing lights, but including non-existing lights, there are over 30 with several of those having already been identified.

If I might make a suggestion, there are quite a number of lights with flying animal names as well as sea animal names which could be started if there is interest. I would be glad to check my records for the approximate numbers of each group.
Last but not least, what do you think of limiting the number of guesses to 2-3 per day per post to allow for more participation? Oops, one other thought is other interesting categories exist such as city names, colors, "edibles" excluding animals, professions, etc. Seems to me this is an interesting way to learn the names of lights that are not as familiar as the well known lights.