American Museum of Natural History on Twitter: "What's the purpose of the sacs of the lesser sac-winged bat? The sacs on its wings are scent glands, which are used to mark territory
Ruptured Air Sacs
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SACS | Acepedia | Fandom
File:Cranial sinus and postcranial air sac systems in birds.svg - Wikimedia Commons
Draconology - Dragon, wyvern wing anatomy by VikasRao on DeviantArt
Economic entomology for the farmer... THE INSECT WORLD. 77 egg-sacs of Lycosid or running spiders. The larva, that succeeds, enters the sac and begins feeding upon the eggs, gradually losing its
SAC bomb and recon wings - home page
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