Any chance you know the Gordon Lightfoot song, Alberta Bound?
I noticed your name right away, being a big Lightfoot fan since I was a young kid, lol...!
Mother foxes some times vocalize a very startling screech to communicate with their kits and mate. Sounds kind of like a woman screaming and it's LOUD. You would hear that, I think, if she was relatively close.
Here is a link to listen, if you don't already know what they sound like. It would be much louder than this, if you are close. I've been very close to one and it scared the tar outta me the 1st time I heard one and didn't realize what it was.
Click this link and then scroll down to the animal section with coyotes, foxes etc. Then click on the sound byte entitled FOX YELL.
http://waterandwoods.net/2008/09/wild-animal-sound-bytes/
Something to keep in mind if you're weed whacking. Most birds are nesting this time of year, a
nd many of them have nest sites in low shrubs and tangles -- even weeds and tall grasses. It's your property, of course, and I know the fox attack has you upset with good reason. Just keep in mind you might be destroying nests and even nestlings if you W-whack vegetation at this time of year.
I hope you don't have any further fox sightings, especially problems, Rancher.
TOB