For the Source text, click/tap here: Pesachim 10
To download, click/tap here: PDF
The Gemara differentiates between the Chulda (marten) on Daf 9 and the Achbar the common mouse whose genetics elsewhere (chullin/Sanhedrin) is described as half animal half earth on our daf. This mud mouse could not procreate and has been described by others in antiquity including Aristotle, Ovid and Averroes.