Maybe you have a hawk or a stray/feral cat that's got them scared. Whenever the hawk is around, the birds and squirrels are nowhere to be found. My backyard was empty yesterday, and I found out why. There was a Huge feral tomcat lounging in my backyard. It's been a big pest, killing my critters, attacking my wife's cat, etc. I was feeling nice so I didn't use the B30 to finish him off. I used the .177 pumper pumped up on 4 to smack his a$$ and run him off. He turned and looked at me for a good 2 seconds before I pulled the trigger. That sum*_*_*_*_*_* knew it was me who lit his buns up. He ran off like raped ape. Let's hope it stays away. If not, then I'll try to get a trap from animal control. Then I can trap him and let the dog catcher deal with it. I don't want to kill it, as I'm not crazy about killing something that I'm not going to eat. Though I could make some nice fur lined underwear out of his pelt. Then I could cradle my nertz in sort, furry warmth.(That's what I always tell our cat when she irritates me) ;-) If I lived out in the country, I'd introduce it to Mr. .223 and not worry about it. But such is not the case.