The search suggestion family has a new addition - image search also "suggests".

The much-loved search suggestion feature is now available on Google Image Search! Not everyone might see this function right now, but it will soon be available to all. When you type keywords into the search box on the Google Image Search page, popular search terms starting with those keywords will appear in a drop-down box below. Just click on the desired entry or press enter, and the results will be displayed instantly. Don't underestimate this small feature; apart from saving effort, it has greater potential when your search target is not very clear.