The letter said: 'your uncle saw another dead deer - taken down by a large canine. Here are some photos of a large coyote caught on film from the front field - no wolves yet.' The white dot/line is the eye's moving in time laps:
Here are some of the ways you can tell them apart:
1) Size and bulk of the main body - the term "husky" applies to the chest and neck of wolves.
Not so to coyotes:
Here is a known original shot of a Red Wolf - done first in color - then with the color stripped out for the night time effect:
Coyotes body type vs Red Wolf:
4)The power of the legs - not the firm stance and the substantial bone structure of the wolfs legs next to the coyotes in the top most pictures.
5) The final clue that I can give is found in the letter "another dead deer by large canine" My uncle was born and raised a hunter, I respect his observation that it was a "large canine" - my aunt - Hi Lou - however is - we'll she's smaller, doesn't carry a gun usually and you know how the mind works. Anyway death by canine - not a Coyote thing.