The image links were pointing to locations that worked in a previous wiki platform (MediaWiki, judging from the article history), and therefore the images were not showing up. Trevor helpfully fixed up the image links so that they work in Kuma (thanks Trevor!). However, only the first image is actually appropriate to the context of this article. The others seem to belong to other articles (e.g., the lion cub drawing is from the SVG tutorial). So, it seems that somehow the images and their file names have gotten scrambled.
I am worried that we may have incorrect images lurking in lots of older articles.
This could be a good starter bug or something for a sprint.