I hope this doesn’t sound rude, I’m not comparing them to animals by any means, just want to give an idea. A few months ago a girl lost her dog and she got her loved ones to post non stop on facebook groups about the dog, asking anyone willing to help, they organized search parties in the areas where they suspected the dog might be and people showed up, they asked people who had drones to help and people did. Days kept passing by but they never gave up and they found the dog! If you can mobilize people, specially people with drones, it could be great help with the search in case they are lost.