This refers to a photograph by Neil Pardington. I have so far been unsuccessful in finding an image of it.
Snapping at their flanks means 'trying to bite the sides of their bodies'.
I'll keep looking.
I understand the general idea of the text below but I am completely puzzled by 'snapping at their flanks'. Any ideas?
"In another, from Canterbury Museum, a group of determined polar bears, wildebeest, grizzly bears and bison seem to be charging down a red walled corridor, with a wolf and an oddly contorted hare snapping at their flanks – this commotion in spite their being in light crates or on differently coloured supporting bases."
"Flanks" are the side and rear parts of an animal - its sides, back legs, haunches. If an animal is being chased it is its flanks which are in most danger as they are closest to the jaws of the animal which is chasing it.
So the animals in your post are running down a hallway with other animals close behind, trying to bite the rear parts of their bodies.
Thanks a lot, I understand now. Creepy photos.