Warning: This is 3.0 Edition material. It is possible that there is more recent 3.5 Edition version.
Inaccurate?

Feathers

(Masters of the Wild: A Guidebook to Barbarians, Druids, and Rangers)

Transmutation
Level: Druid 4,
Components: V, S, DF,
Casting Time: 1 action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One willing creatures/level
Duration: 1 hour/level (D)
Saving Throw: None (see text)
Spell Resistance: Yes (harmless)

This spell functions like polymorph other, except that you polymorph each subject into a feathered animal of Small size or smaller (your choice of species, but all subjects take the same form).
Any subject may choose to resume his or her normal form (as a full-round action); doing so ends the spell for that individual alone.
Otherwise, all subjects remain in the bird form until the spell expires or you dismiss it, restoring all affected creatures to normal form.