The feathers of a bird are, for their weight, among the strongest structures in the world. The bones of this Magnificent Frigatebird weigh less than its feathers! To further reduce weight while maintaining strength, many bird bones are fused. In addition, the pectoral and pelvic girdles and ribs are joined to make a rigid box that supports those long wings, just as the wings support the bird.

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In summer, the thick tangles of streamside vegetation in many canyons echo with an uncanny sound — the Yellow-breasted Chat. You may find it in willow thickets, brushy tangles, and other dense, understory habitats, usually at low to medium elevations around streams. The male Yellow-breasted Chat may sing all night during breeding season. The chat winters in Mexico and Central America.

Support for this episode is provided by Sarah Merner and Craig McKibben from Seattle, Washington, and generous listeners around the world.

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Bird song caught the ear of Italian composer Antonio Vivaldi. And he even named a 1729 flute concerto for a bird — the goldfinch. The source of inspiration for Vivaldi's Goldfinch concerto, or Il Gardellino, was the European Goldfinch, a tiny bird found throughout much of Europe, where it frequents gardens and roadsides. No wonder Vivaldi found the goldfinch irresistible.

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