I have had better luck on reds using a red fox puppy sound. Play rabbit distress first then switch sounds. Greys and coyotes kill their pups so it seems like they pay attention to the noise even when there is no young pups around. If you want them close I dont know what to say, I have only had one inside of a hundred yards this year and he was I believe mentally ill! {And so was I cause I missed the bastard.} It just seems typical that a red will "hang-up" about one to two hundred yards out, sit down like a dog and just look at where the sound is coming from for several minutes. That is when we inject him with 52 grains of lead poison with red light enhancment. Not being able to use artificial light is a real kick in the tail, besides night vision I cant help much on that one. Maybe I am wrong but I have seen alot of reds that sure acted or seemed to be able to see at least some infrared light, they acted too spooky when we used it in conjuntion with our night vision. Daylight calling for fox is usually not as productive as night but it has worked for me in some cases. I usually get up in a tree stand and use a remote call so they are not hunting me. Get to the side of downwind and use a little cover scent. One more thing, reds are timid so they wont stay around were there are alot of greys or coyotes. A good place to try for one is always where you dont have any luck with the others. Good luck, Martin