Thanks for the help I received in identifying my mystery bird. It is a Loggerhead Shrike.
"All About Birds" site, it uses it "uses its hooked beak to kill insects, lizards, mice, and birds, and then impales them on thorns to hold them while it rips them apart." BirdWeb adds the following: "because their feet are not large or strong enough to hold prey, shrikes find a crotch in a tree, a thorn, or barbed wire to hang their prey on while they eat. Prey may be left on such a site for later consumption." Hmmm... very interesting bird!