How might a lost alien re-connect to a hidden secret base

In an earlier question I shared the idea of Bill, the stranded alien that has a challenge getting the attention of local humans because he's the size of a mosquito.

He needs to re-establish contact with others of his kind, elsewhere on the planet in similar capacities. They would have ID protocols and such, but he can't just turn on a radio beacon because his surviving kit is only what he had on him, very tiny and low-powered. His peers are not expecting someone to stop by, and they are actively camouflaged and unobtrusive.

How would they (Bill with help from his new human pal) find Bill's peer, even if they knew a general area in which to look? Since the names are arbitrary translation labels we'll refer to him as Carl. Carl might be engrossed in fungal hyphae in topsoil and not notice a huge billboard put up on the acre he's exploring. He's simply not paying attention to things on this scale.

Edit: yea, it's not just "what would Bill do?", but what kind of general procedures would be in place, given the capabilities of the scout described?

posted almost 9 years ago

JDługosz‭

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