Brick sorting Lego bird

From Tinkernology:

I am amazed by this creation. It does not have a "brain" to help it sort incoming pieces, only one motor. Here's how the author describes it:

When the beak can close no further, power is transferred to turning the bird. If the beak closes on a larger brick, it will begin turning earlier, and thus further, before dropping the brick.

I like how computers and electronics can allow for sophisticated processes, but analog or mechanical methods are always something to marvel at and give due respect.