The new panasonic is 2500 GBP

The new panasonic is 2500 GBP.  Pretty nifty camera for 4k.

I pesonally like hededicated camcoder route.  I would think that if you are doing wildlife, you would need to change settings quickly.  Messing around with an ND filter, the aperature, gain, and other settngs seem to be much quicker for me on a dedicated camcorder.

I have a Sony NX5 and I love the way I an quickly Manualy change stuff NOT by going through a menu.

The 4k rcording, with enough light, will give you much more leeway to zoom an crop for a better composition too. If money is'nt too tight, I vote for the camcorder.