lets take one by one..your first priority is wildlife photography...so which zoom lens you will be getting after getting the DSLR...you may have figured out that a zoom lens will cost additional 12-18k as per requirement.
for family pics any 18-55 kit is good..no issues
for video definitely canon DSLR+stm kit lens is much better then nikon
ash1 its not a bad choice but for the same price even canon is gving 700D+18-55+55-250 .. you can go either way..no issues ...also go to the shop once and take both in hand and feel ..you will know which one you want.