A well-known test for consciousness in an organism is to observe its ability to recognise itself in a mirror (see wikipedia article: "Mirror test").
Why haven't I come across a "non-visual" mirror test? I.e. one that involves one of the other senses?
For example, how about testing for consciousness in bats by using an "audio mirror", the premise being that perhaps bats may recognise themselves through echolocation?
(image adapted from here)