Black-throated Blue Warbler [male]
This is one of the fastest moving birds I've ever seen. He was in a constant state of motion - flitting throughout the yard and in the Frangipani tree. His mate was around but I was not able to get a photo of her.
The striking Black-throated Blue Warbler (Dendroica caerulescens) is one of the most common breeding songbirds in the extensive northern hardwood and mixed deciduous coniferous forests of the northeastern United States and southeastern Canada. It is our most "sexually dichromatic" wood warbler, that is, females and males differ strongly in color. In fact, this difference is so dramatic that the two sexes were considered separate species by ornithologists in the early 1800s. Black-throated Blue Warblers are temperate, tropical migrants and spend most of the year in the tropics. They leave their northern breeding grounds in late summer and arrive on their winter quarters in the Caribbean by mid-October. Most individuals overwinter in the Greater Antilles: Cuba, Jamaica, Hispaniola, and Puerto Rico. [I guess this one and his mate decided to stop-over in Miami.] In April, warblers leave their winter haunts and migrate north again to breed, arriving back on their breeding grounds by mid-May.
Information found at Cornell Lab of Orinthology. (October 22, 2006)