Northern Mockingbird (Mimus polyglottos)
Mockingbirds reportedly form enduring and faithful partnerships with a single mate and are known to defend their nests and their young with surprising vigor, chasing away cats, dogs, hawks and other larger birds, and even humans who wander a little too close for comfort.
Each mockingbird seems to have a different repertoire, as they learn and mimic the songs of other birds they encounter or that live around them. And as they continue to learn new songs throughout their life, some individuals may have dozens of calls to choose from. Mockingbirds' mimicries are often almost indistinguishable from the original. But if you hear a certain bird song three or more times in quick repetition and then a totally different sound repeated from the same spot, you can be pretty sure you are listening to a mockingbird's medley.
As always, you can click on any image to see a larger version. Also, check out Bird Photography Weekly #122 for more great bird photos from around the world.