Flickr has find an interesting strategy to capture the visitors that arrive to the website through Google Image Search. Each time you arrive at a photo page using Google, Flickr will provide a yellow note just below the search with the text:
We found 262,353 photos matching [keyword]. Click “search” above to see!
Also the search box is prefiled with the query.
All in one, a simple strategy that could boost the pageviews by a few percents.