We have a small group of black birds that come every year to our our beachside condo in Brevard County. They arrive in March or April, stay about 6-8 weeks, and then move on.
They are similar to the grackles that are common in this area, except that they are smaller, and have bright yellow beaks. They all seem to be completely black, with no speckles of white, and no brown birds like the female grackles.
They sound similar to grackles in their vocalization.
Anybody have any idea what they may be?