This blog is not, fortunately, the top Google hit for "three-toed sloth" (just the second and the fourth), but a large number of people, to judge from the server and activity logs, come here looking for information about sloths, and especially looking for pictures. Let me recommend Wikipedia, and sloths.org, particularly its links page. sloths.org provides many nice pictures, e.g. this one, unfortunately without photo credits.