Looks like this magnolia warbler is doing exercises, or maybe looking for predators.
Taken in May 2015 at our little water feature.
The name of the species was coined in 1810 by Alexander Wilson, who collected a specimen from a magnolia tree in Mississippi. He actually used the English name "Black-and-yellow Warbler" and used "magnolia" for the Latin species name, which became the common name over time. source - Cornell Lab of Ornithology.