I have some little black ants in my motorhome. I’m pretty sure I picked them up at my last stop in upstate New York but I’ve since driven far away from there. Wikipedia says little black ants nest in the soil so presumably I didn’t take their queen with me....
Sorry, no Lemming for scale (Wikipedia tells me a Lemming is ‘13–18 cm (5–7 in)’. So about the same size. I would imagine there are many about, but I only notice them when they are on doorframes or something....
A very interesting bug. Aside from the colouration it has fuzz on part of its antennae, and horns/ spikes on its back. Another photo from the side in comments.