Weaver birds build one of the most intricate nests in the avian world, but the swiftlet’s nest is built entirely out of spit. ➡ Subscribe: bit.ly/NatGeoWILDSubscribe About Nat Geo Wild: Welcome to a place so wild, anything can happen. Nat Geo Wild is the network all about animals from National Geographic, where every story is an adventure and your imagination is allowed to run wild. Get More Nat Geo Wild: Official Site: bit.ly/NatGeoWILD Facebook: bit.ly/NGWFacebook Twitter: bit.ly/NGWTwitter Instagram: bit.ly/NGWInstagram Home Renovating with Nesting Birds | Nature Tech youtu.be/nxDHr-J72ik Nat Geo Wild www.youtube.com/user/NatGeoWild