Not too bad there; it would help with suggestions if you posted the EXIF data (shot settings) that this image was taken with (focal length, shutter speed, aperture, ISO). Also, was this cropped? If so, how much, etc.
With birds/wildlife/people it's all about the eyes. If the eyes are clear, in focus, visible, etc it is easier for the viewer to make a connection with the image. So try to make sure you've got an angle with good visibility to the eyes when shooting the living things. Note how her eyes are *mostly* away from you/the viewer, here?
A couple from my trip to Fairbanks a couple of years ago, for example:
https://flic.kr/p/bWFqyP
https://flic.kr/p/ce3Mwb
(even this far away, if you zoom in you can see the eye is around the side enough to be a direct line of sight.) Ideally, I'd also have shot this with more room in front of the critter, but she wouldn't move so the flag was framable that way...
And, since I'm sure you know, these are not ones you want to get too close to (physically), a longer lens would help quite a bit. I'm *guessing* that this was shot with something along the lines of a 55-250 or one of the 18-200 offerings...?...
Also, environmental shots are nice, but try to get them *doing* something rather than just standing there, if at all possible (scratching an itch, twitching their heads, and such).
Lastly, processing your images in something like Lightroom, CS6/7, etc will also help you bring out better colors/contrast/detail in the images over and above what's produced directly by the camera. This image appears to have been shot in high, overcast and has some pretty strong highlights and the colors are a little bit washed out. Both easily correctable in less than a minute with some simple PP software.