Should I use a DSLR for shooting nature video?

I am currently looking into upgrading my video cameras and I am wanting to know what the best camera is for nature videography? Should I stay with a good video camera or get a dslr? Any help would be greatly appreciated. Thank you.

Most video camera will give you auto focus for moving subjects, most DSLR are manual focus so more difficult on sports or moving animals. Most good video camera have a built in zoom to 10-20 times. DSLR lens can have manual zoom that really can't smoothly be applied. Video cameras are for video and really are not much good for photos, DSLR higher grade newer version shoot great video and great photos ... one camera does both. I've had both, for last few years as DSLR cameras improved with video I carry them now. On DSLR full frame you will get higher quality lower grain than a cropped sensor. Cropped sensor will reach out further with a given lens. It really depends on how you will use it. My suggestion if you are serious, don't save a few hundred dollars on the lower grade camera. Good luck.

You might want to consider the Canon 70D. It has a "live" focusing feature in video mode. You would need the specific STM class lenses to use this feature however. But you can get a decent package for around $2000 (or less).

Thank you for the input. I am in not to big of a rush to purchase anything just weighing the pros and cons of both. I really appreciate it.

The live view/AF focusing of the Canon 70D, which I own, works really well with any lens that has the ability to auto-focus. My Sigma 50-150 2.8 OS works perfectly with my 70D; so did my former 24-105, 100 2.8 macro, and Sigma 18-35 1.8. I heard that the STM lenses have a smoother focus when transitioning between different focal points, need to try one out to know for sure.

The 70D is really amazing. When shooting video, you simply touch the LCD anywhere you want the focus to be and it nails it every time. You can literally keep touching the LCD to select a different focus point and in less than a half a second it has locked on each and every time.