Unlike other animals, human beings spend a lot of time thinking about what is not going on around them, contemplating events that happened in the past, might happen in the future, or will never happen at all. Indeed, “stimulus-independent thought” or “mind wandering” appears to be the brain’s default mode of operation (1-3).
While the claim is supported for humans by the cited papers and their finding:
Mind wandering occurred in 46.9% of the samples and in at least 30% of the samples taken during every activity except making love.
I couldn't find a strong evidence that for all other animals it is not true. Even if it, arguably, may sound plausible for domestic animals, it seems less convincing for primates, elephants or dolphins (without a proper experimental support).
Are there any research on "wandering mind" for other animals? If so, do they support or refute the "unlike other animals" line?