part of part of in taxon results in morphogenesis of anatomical structure morphogenesis beak development beak morphogenesis The process in which the anatomical structures of the beak are generated and organized. The avian beak is an external anatomical structure, in the head region, that is adapted for feeding self and young, catching prey, probing, etc. It encompasses, but is not restricted to, the maxilla, mandible, maxillary rhamphotheca, mandibular rhamphotheca, nostril, nasal fossa, nasal bones, egg tooth and rictus. mah 2010-03-17T03:54:34Z GO:0071729 Aves beak