39 Marabou Stork Facts - The Bird of Nightmares | JustBirding.com
Air-Sacs on Leks by WildandNatureFan on DeviantArt
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Brian Engh on Twitter: "These air sacs are also important for display and sound making! Air sacs have evolved into elaborated socio-sexual display structures in multiple groups of birds >independently< https://t.co/tZ0hfL1zbr" /
10 Weird Self-Inflating Animal Species - Listverse
Is there any evidence regarding these inflatable sacs on a sauropod's neck (as shown on this Dreadnoughtus from Prehistoric Planet) or is it purely speculative? : r/Dinosaurs