Skyhigh, If you are narrowing down the best times, I'd say from daylight till 10:00am and last 2 hours before dark, but I did call that coyote in at 11:30 on a warm day. I think you can call anytime and get results but I think others would agree most importantly is a weather factor. Don't look for the best calling in the early morning if the winds are blowing your hat off.
I drove into city tonight and bought up some nice camo, head to toe. What the heck, it's my birthday in a couple days anyways...err thats what I told the wife anyhow (trying to justify the bill) <img src=icon_smile_wink.gif border=0 align=middle>
This is starting to get expensive.

New .223 Rifle w/scope....$400.00
Phantom electronic call...$200.00 (and it's going in the trash)
Honda 450 Four-trax ATV..$6,400.00
Camo Outfit................$150.00
Picture of me with a coyote..PRICELESS!!!
For anyone else...might be a divorce LOL!

Going to post another pic tomorrow just to see the contrast and I think this will be fun if I can get her to take pictures.
Stay tuned......