Things you can search for:-
Birds by name - eg: crow, "black-tailed godwit" (note the quote marks)
Locations - eg: Stanpit, "Fisherman's Bank"
Dates - eg: 2005, "26th September 2012"
Photographers - eg: "Joe Murphy"
...and just about anything else!
This search facility now uses Google's Custom Search engine
As with all Google searches, you can search for single words with just that word but multiple words/phrases need to be enclosed in quotation marks, as show in the examples on the left.
Note that the search result page has two tabs, "Web" and "Image". "Web" shows links to pages with the search term, "Images" shows photos with the search term in the image attributes.