This just doesn't seem like 'wildlife' to me... there may be some 'wild' life happening in the subway, I don't know... But these are - mice. I mean, not exactly out in the wild... (Well then again, how wild it may be in a subway in a city I don't know! lol)
It is an interesting photo, and on the photographer's website there are a couple more of a mouse underground (or two or more, don't know how many different mice he was watching and photographing). So certainly it took some hanging around in a subway and watching and waiting and a good bit of persistence til these mice did something interesting or unusual. So it is a right time - right place kind of photo.
But shooting sports you do this all the time, watching and waiting til something photo worthy happens, and sometimes you luck into getting a particularly interesting moment. Maybe that's why to me it isn't that phenomenal; it is but yet it isn't. I suppose if you spend enough time watching critters (or hockey players in my case), they'll eventually do something unique or interesting.
I guess a camera equipment manufacturer can hold a contest and call it what they will, and people choosing a people's choice will choose whatever captures their fancy. I think this photographer has better photos from a photography/composition standpoint on his website.