This plugin is built for people keen to reuse flickr images in their blogs.
Look for the trident symbol at the end of the "insert media" toolbar
This Screen will appear
Type in your search term here
If you don't find what you want you can search again
Pictures are brought back from flickr which match your request. Click on "choose" for the picture you like
The picture is brought back, and added to the media library
The picture is attributed
You can now either insert the picture into the post, or set it as the featured image.