The most likely predator which would remove three robin's eggs from a nest on a second floor window sill?

The eggs had been laid ove the period of a week. All three eggs disappeared one night. There was no evidence of broken shells or yolk ether in the nest or on the ground below.

Answers:
How would a predator have reached the second floor window? Have you ever seen a snake on the property? They swallow eggs whole. Watch where you step outside...

Other answers:
Raccoon.
Raccoon.
Hawk, crow, or my wife if she ever finds something like that before breakfast. I don't know what the hell's wrong with that lady.
another bird -probably a male- birds are predatory
Possibly a squirrel.
possibly a snake...there was a nest at my house with baby
birds and the snake crawled up and ate them all. it was
awful...
Maybe a Bluejay.
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