[2017] Northern bog lemming

Do you have other pictures of these animals? I suspect they are some Microtus species. A German zoo also pretends to have bog lemmings, which are in fact Microtus guentheri.

EDIT: I did find some pictures after quite some digging that prove these are indeed lemming: ZOOTOGRAFIANDO (6.100 ANIMALS): LEMMING DE PANTANO NORTEÑO / NORTHERN BOG LEMMING (Synaptomys borealis)

Hi @lintworm, I have uploded another photo [2017] Lemming - ZooChat