How does a mouse fit through tight spaces such as under a door or through a very small hole? I heard that their bodies can flatten thinner than a pancake or a sheet of paper. Any answers or photos you can send will be much appreciated. P.S. this is not a homework assignment. Thank you!

G'Day Eileen:

I would say that since mice don’t have collarbones like us they can fit through gaps essentially the size of their skull. The actual size of the skull will depend on age, perhaps gender to some degree and mouse strain. I’ve got no idea how many mouse strains there are in the wild but I would imagine there are quite a few.

Last edited by Steve Lolait (17th Nov 2010 12:18:14)

Steve is correct - a small field mouse will fit through a hole about 2cm across. There is no way they can flatten their body thinner than a pancake or a sheet of paper.