I couldn't find the source of your images due to improper crediting. By providing a link, you are supposed to give credit to the original creator, whereas you simply link to a larger version of the image. This isn't crediting anybody.

Another point is that you should try to avoid saying CC0, when the licenses are not CC0. One image I c hecked was in fact CC2.5, for example.

This just helps the curation process. Cheers!