Matching Pairs Bird TerminologyOnline version Match these bird terms to their meanings. by Légende X 1 MOLT 2 GIZZARD 3 PLUMAGE 4 STERNUM 5 WINGSPAN 6 MANDIBLE 7 RUMP 8 TARSUS 9 CREST 10 KEEL Distance from one wingtip to the other Lower leg bone between knee and foot Ridge on the sternum for flight muscles Muscular stomach grinding up food Upper or lower part of a bird’s beak Breastbone that anchors flight muscles Feathers covering the body Seasonal shedding and regrowth of feathers Lower back area above the tail Tuft of feathers atop the head