This masked bird with the hooked beak is a Loggerhead Shrike. They are found year-round in the southern United States. In summer, some of them migrate to the central states and into Canada to raise their young. They like open country where they perch on low bushes, power lines, or barbed wire fences. When they spot an insect, lizard, or mouse, they swoop down and grab it. Sometimes they will impale their prey on a thorn or on the barb of the wire fence. This might be a way to mark their territory or they might just be saving it to eat later. This photo was taken at St. Joseph Peninsula State Park in Florida.
Loggerhead ShrikeSt. Joseph Peninsula State Park