One: About fifty years ago, several scarlet ibis, natives of South America, were released in south Florida and interbred with their close cousins, the white ibis, producing a bird that shows pink as an adult. This bird could be a hybrid white-scarlet ibis.
Two: scarlet ibis begin life as gray-brown birds and slowly turn through pink to red as a result of crustaceans in their diet. This bird could be a young scarlet ibis, one of the very few in South Florida. If so, he/she hasn’t grown scarlet yet.
This bird appears to be young, as indicated by the neck and head gray-brown coloring that is common to the young of both white and scarlet ibis.