[landroverroy]

Lead diet. You can't be sentimental about it. They aren't when they eat songbird chicks. If we give them a free supply of food, they will multiply and take more songbirds.

True - much as cats do.
But possiby if we feed them they won't feel the need to eat the songbirds chicks.

[Steph Hen]

Take your time and plan well. set the eggs out where they can see them and you can see the crows
Find a comfy hide spot or build something; maybe, a sack with a hole in it nailed over a shed Doorway?

Feed them for another few days. Ideally at the same time of day. Then have a go at them.

You could even try cracking one so it will break at they pick it up or even super gluing an egg to a bit of string and to the ground? just to delay it/them a bit?

One other note; if they watch you walking from eggs to your hide they may not come down.
So get someone else the eggs down that day, do it earlier/ phase them all away so they don't see you go to your hide. 
Good luck.


Alternatively, I've been wanting to build a ladder trap for years! Google it! I figured I could build it into the roof of the next run that I make, so it's multi purpose.

[Marches Farmer]

But possiby if we feed them they won't feel the need to eat the songbirds chicks.
[/quote]
Or the crow survival rate could improve and there'll be more of them to eat the songbird chicks.