Tag Galaxy http://taggalaxy.de/ allows you to find images using a tag or keyword. It accesses the Flickr site and searches the Flickr photo tags and return images that match your search. It then displays them in an interesting and almost tactile way! Thanks to Vital for sharing this with us.
This collection of images of Urban Camouflage photos was tweeted by Tim Rylands recently. They make up an interesting study and they would contrast well with any work on the way animals camouflage themselves. Check out the images at http://www.webofentertainment.com/2010/03/urban-camouflage.html
If you are looking for a web tool to create slide shows from photos then take a look at http://photopeach.com/
You can create slide shows with text and background audio all on a website.
For a recommendation and more information visit the blog post from Chickensaltash at http://chickensaltash.edublogs.org/2009/10/18/can-you-tell-what-it-is-yet/