Extended Data Fig. 6: Axial CT and µCT images of the SPD across Aves (part 2).
From: The respiratory system influences flight mechanics in soaring birds
Each axial slice was selected using the MPR as in Extended Data Fig. 3. Purple text and arrows indicate presence of the SPD. a, White pelican (Pelecanus erythrorhynchos). b, Brown pelican (Pelecanus occidentalis). c, Black crowned night heron (Nycticorax nycticorax). d, Turkey vulture (Cathartes aura). e, Andean condor (Vultur gryphus). f, Common buzzard (Buteo buteo). g, Bald eagle (Haliaeetus leucocephalus). h, Golden eagle (Aquila chrysaetos). i, Bateleur (Terathopius ecaudatus). j, Spectacled owl (Pulsatrix perspicillata). k, Great horned owl (Bubo virginianus). l, Southern ground hornbill (Bucorvus leadbeateri). m, Green woodhoopoe (Phoeniculus purpureus). n, Curl-crested aracari (Pteroglossus beauharnaesii). o, Keel-billed toucan (Ramphastos sulfuratus). p, Gyr/saker falcon hybrid (Falco rusticolus/cherrug). q, Peregrine falcon (Falco peregrinus). r, Sulphur-crested cockatoo (Cacatua galerita). s, Blue-and-yellow macaw (Ara ararauna). t, African grey parrot (Psittacus erithacus). u, Moluccan eclectus parrot (Eclectus roratus). v, Australian zebra finch (Taeniopygia castanotis). w, Common raven (Corvus corax). x, Blue-faced honeyeater (Entomyzon cyanotis).