I am perplexed. In none of the articles I have seen is there any mention of an aerial component of the search. Does anyone know if there were wings in the air?

In my experience, once a search extends beyond about twelve hours (and most of them don't) you throw aerial resources into the effort. Reports do mention that she was on a high point where there probably would have been a better chance of spotting her.

I was involved in an equally confounding search over thirty years ago (the individual still hasn't been found) and after two weeks we were throwing everything we could possibly think of into the operation.