
These pictures are of the only known all black flamingo. It was photographed in Cyprus in the last few days. There was one previous record of a black flamingo in Israel last year. This one from Cyprus may be a different one, but given that the Israeli one has disappeared and given that Cyprus is an easy flight for a flamingo from Israel, there is a strong possibility that this is the same one, and possibly the only one in the world.
Obviously, the mutation which gives rise to melanism (an overproduction of melanin) is a rare event. We know flamingos produce melanin because they have some black wing feather and some black on their beaks, so what is probably happening here is that the gene(s) controlling when and where the gene for making melanin is switched on (or off) has failed.