When you comment on this website and don’t have a custom Gravatar avatar assigned to your email address, an icon is automatically assigned to your comment. All of these avatars are from Flickr.com and are licensed under a Creative Commons license. You can click on each picture for the full size with attribution. You can also choose a different critter by saving the full size photo to your hard drive and assigning that photo to your email address at gravatar.com. You could just save the cropped version from this page, but it’ll look better when you use the full size and you can crop it to your liking.