John Chrysostom
There was no necessity to discuss the serpent and similar creatures, as it was clear they were repulsive and detestable to everyone. However, they are referenced in the book of Deuteronomy.
These also shall be reckoned among unclean things, of all that move upon the earth. The weasel, and the mouse, and the crocodile, every one according to their kind:
וְזֶ֤ה לָכֶם֙ הַטָּמֵ֔א בַּשֶּׁ֖רֶץ הַשֹּׁרֵ֣ץ עַל־הָאָ֑רֶץ הַחֹ֥לֶד וְהָעַכְבָּ֖ר וְהַצָּ֥ב לְמִינֵֽהוּ׃
One Church Father comments on this verse
There was no necessity to discuss the serpent and similar creatures, as it was clear they were repulsive and detestable to everyone. However, they are referenced in the book of Deuteronomy.
Passages read together with this verse.