Sorry-
Didn't mean to be rude. Guess I didn't read your question right.
I personally saw an upsurge here right after the weather turned colder in the fall and really didn't have all that high of a setup to call in ratio until then. Don't really know why, maybe they need more food to keep up body temp or whatever? I have also noticed a distinct increase in activity immediately before and following the movement of any weather front containing moisture.
I do have a friend in NE that swears the time he gets the most action is right about this time of year when the pups are out wandering on their own for the first time.
I had always heard that coyotes were least active and responsive to calling during the hotter months of the year, but their are some guys here that had luck calling in AZ or NM with the temp in the 90's.
Once again, not doubting your abilities, just didn't quite get what you wanted right away (duh on me). Don't know if any of this helped or not; it might just depend on where you are in the world.
PS-Did that female you killed come in alone or were their younger dogs following her?
