C.Killmaster
Georgia Deer Biologist
With all due respect, I would bet those instances coincided with environmental issues that cannot be helped! Such as drought, disease, habitat loss or degradation, etc. but given suitable factors the removal of coyotes does help exponentially the vast majority of time.
There has been a ton of research over the last decade in the Southeast and the results vary greatly. What we've learned is coyote predation on fawns is highly variable across the landscape and trapping can be very effective on some properties, but not others. On some properties it was successful the first year, but not subsequent years. Sounds like it's been working for you, so keep it up! One thing we know for sure is that coyotes should be removed just prior to fawn drop and throughout it to be the most successful. Transient coyotes fill in so quick that it negates most of the work done earlier in the year.