Sample photos of bedbug bites are available on WebMD.com and HealthLine.com. In addition to photos, both websites explain how to determine whether a bite is from a bedbug.
To see photos of bedbug bites on WebMD.com, enter "bedbug bite" in the search box at the top-right corner of the page, and click the article that appears at the top of the list. A photo slide show is available on this page that shows what bedbugs and their bites look like.
Similarly, to see photos on HealthLine.com, enter the same search criteria in the search box. Select the first article, and click on the arrows to see photos.