hominoids: lar. air sac, no dive
humans: no air sac, dive
walrus: phar. air sac
whale: internal air sacs, sperm whale has double air sac above upper jaw
Frog: part skin breather, large vocal sac, very vocal, tail loss at youth, hops, qpal on branches
Salamander: full skin breather, medium vocal sac, silent, long tail, slithers/qpal walks on ground
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