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An illustration of the "ailmentary canal of Bluebird, reduced; after Audobon. a,b, gullet or oesophagus; c, proventriculus; d, gizzard; e, f, h, intestine; i, cloaca" (Forbush, 1907).

Ailmentary Canal of Bluebird

An illustration of the "ailmentary canal of Bluebird, reduced; after Audobon. a,b, gullet or oesophagus;…