Common Kingfisher: fascinating record! Hope its identity gets verified satisfactorily. While dealing with it, perhaps the NACC could settle the correct scientific name for the species under ICZN rules? See posts 73, 75-6, 78-79 in this thread.
That will not happen. As I informed Andy Kratter, the author of the relevant proposal, by e-mail (16 Dec 2018), the claimed specimen of Alcedo atthis in Cuba was reportedly destroyed by rats. The fact that the specimen no longer existed was also clearly signalled in our field guide to the West Indies published last year (p. 375). The person who is said to have collected the specimen lived in Europe for some time.