Individual pictures:
By Gary Bembridge and licensed under the Creative Commons Attribution 2.0 Generic license.
Sources:
https://commons.wikimedia.org/wiki/File:Arctic_Fox_in_Alkhornet,_Svalbard,_Arctic_(20095874740).jpg
https://commons.wikimedia.org/wiki/File:Arctic_Fox_in_Alkhornet,_Svalbard,_Arctic_(19661233784).jpg
https://commons.wikimedia.org/wiki/File:Arctic_Fox_in_Alkhornet,_Svalbard,_Arctic_(20095876530).jpg
Also good for creating own memes or comix
https://watabou.itch.io/stick-figures
It creates randomly new scenes by clicking on the image
(see also other projects of the author in https://watabou.itch.io
Also fine, which may be used to create memes https://htck.github.io/bayeux/#!/
All FOSS
Cool! It’s nice to have our own meme formats here on Lemmy!
Best source of free CC and GPL HD images (sounds, vectors, videos,music) is Pixabay
To add as search to the browser
https://pixabay.com/images/search/?q=%s
I think just the first and last images are enough for a meme.