Try a Red Tail Hawk Decoy during daylight hours. Hawks are more natural during the day.Crow decoys are a must. I use the windsock design that stack inside one another for easy moves and set ups.A crow fight call works extra fine this time of the year. Followed up by the crow distress.
I have killed crows witha 410 gauge up to a 12. I really like my 20. High brass in 6-7 1/2 shot does the trick with a modified choke.
If a single crow shows up during your calling.....let that one go. It will go back and get the others to join in.After you bust into them go to the crow distress call RIGHT AWAY!You should get follow up shots on at least 40% of the birds that high tailed it away.www.crowhilldecoy.net has the windsock designed crow decoys and the Red Tailed Hawk decoy.Or check out www.crowbusters co.