The XT-1 is an excellent camera but wildlife, especially birding, is it's weak point. Macro work with the Fuji 60mm f2.4 macro lens is fine, but currently the 55-200mm lens is the longest XF lens although a longer lens is on Fuji roadmap fot 2nd half of 2016. I am saving up to buy a used Canon 7D and hope to borrow a 150-500 Sigma to see if this is a better and probably cheaper birding option.
UPDATE. As a lot of my photography is of nature so I reluctantly switched back to DSLR and now use Canon 80D with collection of lenses including 70-300mm L, Sigma 100mm f2.8 Macro and Sigma 150-600mm.
For travelling light I have Sony 6300 with kit standard zoom and 55-210mm but wonders of wonders Sigma have made an adapter for Canon EF to E mount and all the previous mentioned lenses will function on 6300 albeit the AF is a little slower and less certain. Still 4k video with these lenses all for less than an extra £200 can’t be bad!
This is an ideal time as the Avocets have returned, I counted 20, but when editing my photos four turned out to be Shellducks.