LOL... Crows or Ravens.... Both are smart problem solvers... Bout the only way is to make it so they cant get to the eggs. or feed.
Crows are smaller than Ravens and have a squared off tail... Ravens have a rounded tail.
Crows also fly in flocks of thirty or more.... all Family members.... Ravens fly in smaller family flocks... five or six....
birds in the Corvid Family are a particular fascination for me. Crows Ravens magpies Jays..... there are about 120 different species in the family
but Crows and Ravens have documented intelligent levels similar to apes.
I personally have had a crow Take off the ground just as I came away from a stop sign.... He was carrying something and kept looking back at my car... then he dropped it and swerved off. I looked in the rear vew mirror and he was back on the ground eating what could only be a Nut.
sorry about the documentation set.... but follow some of the steps by the humane society... Once deterred they will move on.
Past poultry: Buff Brhama, EE, Barred rock, Wellsummer,
Bantam mixes, Araucana, Turkeys, & Guinea Fowl.
Future poultry: Guinea Fowl, Sumatra, Wellsummer, Muscovy
"A dream without a plan is just a wish" Katherine Paterson