Salivating for a New Nest | Wild Borneo

Cave swiftlets use saliva to build their nests high on cave walls. ➡ Subscribe: https://on.natgeo.com/41A7tf0 ➡ Watch all clips from Destination Wild here: http://bit.ly/DestinationWild About National Geographic Animals: National Geographic Animals brings you closer to the wild than ever before. Take a journey through the animal kingdom to discover fierce predators, surprising behaviors, adorable babies, and more through our fascinating wildlife documentaries, series, and specials. Get More National Geographic: Official Site: https://nationalgeographic.com Instagram:   / natgeo   Facebook:   / natgeo   Threads: https://threads.com/@natgeo X: https://x.com/NatGeo LinkedIn:   / national-geographic   TikTok:   / natgeo   Reddit:   / nationalgeographic   Pinterest:   / natgeo   Salivating for a New Nest | Wild Borneo    • Salivating for a New Nest | Wild Borneo   Nat Geo Wild    / natgeowild