File:Flickr licenses.png

English: Breakdown of Creative Commons licensed files on Flickr by license type. Key: White = CC-BY; Yellow = CC-BY-SA; Red = CC-BY-ND; Blue = CC-BY-NC; Green = CC-BY-SA-NC; Purlple = CC-BY-NC-ND. Where CC = Creative Commons, BY = attribution, SA = ShareAlike, NC = noncommercial and ND = no derivatives.

At Flickr the default license is "all rights reserved", but the uploader can also choose from these Creative Commons licenses. All licenses require attribution. Commercial use is one factor that CC licenses can be broken down by, the other is modifications. For this second dimension there are those that don't allow modification (ND), those that do with the restriction that derivatives be similarly licensed (SA) and those that allow derivatives without restriction. The only files that can be uploaded to Wikipedia are CC-BY and CC-BY-SA (see Upload work from Flickr). These make up only around 20% of CC-licensed Flickr files, or a little over 3% of the total collection, according to these data. A clear conclusion is that permitting commercial use is not popular, with about 3/4 of files being noncommercial. No derivatives and ShareAlike are about equally popular, with no restrictions on derivatives being somewhat less popular.

Created in Microsoft Excel. Source data: https://www.flickr.com/creativecommons/ (from late 2008).

Data: CC-BY: 10,302,334; CC-BY-SA: 7,168,897; CC-BY-ND: 3,521,934; CC-BY-NC: 12,257,280; CC-BY-NC-SA: 24,930,011; CC-BY-NC-ND: 28,278,034; total: 86,458,490 CC images. According to Flickr (personal communication; the figure is not published online) there were around 2.7 billion photos at the time, so CC images would then be 3.2% of the total.