I used to do a lot more animal and bird photography when I had a crop-sensor camera and a cheap 300mm lens. Now that I have a full-frame 6D and can only afford a 200mm Canon pro lens, I'm much less motivated to take animal pictures because I just have to get so much closer to the object. I've definitely enjoyed taking portraits and most other kinds of pictures significantly more with my 6D, but I do miss how much closer a crop sensor got me to wildlife!
I took this shot on a snowy day at Highbanks Metro Park in Columbus. I was the only person in sight and there were all kinds of little animals scurrying around in the snow!