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Wing of a Bird, Showing the Arrangement of the Feathers

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Wing of a Bird, Showing the Arrangement of the Feathers.jpg Wilson’s WarblerThumbnailsWood ThrushWilson’s WarblerThumbnailsWood ThrushWilson’s WarblerThumbnailsWood ThrushWilson’s WarblerThumbnailsWood ThrushWilson’s WarblerThumbnailsWood ThrushWilson’s WarblerThumbnailsWood Thrush

The longest feathers or primaries (PR) are borne by the two fingers (2 and 3), and their palm-bones (CMC); the second longest or secondaries are borne by the ulna bone (U) of the fore-arm; there is a separate tuft (AS) on the thumb (TH).