The black-headed grosbeak has a very distinct sound, which is a series of heavy whistled expressions. A western North American bird, they are migratory, moving to Mexico in the fall and back north as far as  Canada in the warmer months. In the warmer months of the year, they can be seen in the southwestern part of the United States, but some live all year in the Arizona desert. Black-headed grosbeaks can be found in pine-oak habitats, they are partial to oak woods, dry pinon-juniper slope areas, or in riparian trees. These birds have large thick beaks, good for cracking seeds and hard shelled insects, berries are something they will eat as well. They are predators to monarch butterflies, as the toxin that make a monarch poisonous to many birds does not affect the black-headed grosbeak. I saw this bird on a high desert hike in northern Arizona. He was posing for me to make sure I got both of his good sides.