I wouldn't exactly call it narcissism, but animals like to look at their reflections just like people do. And when a photographer is there to capture the moment, you get double the subjects! See 16 photographs of animals and their reflections in water in a gallery at Environmental Graffiti. Link
(Image credit: Flickr user ucumari)
(Image credit: Flickr user ucumari)
There are quite a few more species of animals that have passed the mirror test.
In fact, all of the great apes past the test; orcas, elephants and magpies also pass the test.
Other animals are able to pass a variation of that test, such as pigeons.