The screenshot is the PNG file. The download is the SVG.
I merged all the logos into one. I got the idea from an image uploaded to Ubuntu Daily. Here is the direct link to the image on Ubuntu Daily: http://ubuntudaily.com/wp-content/uploads/chameleon_logo.png
NEW - I have found out that the image that inspired me wasn't originally from Ubuntu Daily but, http://fullcirclemagazine.org