[Pontiac]

What is now happening is the birds are avoiding areas with GMO crops.

So you are saying that a bird can tell the difference between heirloom corn and GMO corn?

How do they know the difference?

I have read that buzzards can smell a rotting carcass from miles away. Does it smell different?

I understand that owls can hear a mouse burrowing under the snow. Maybe GMO corn sounds different.

[editor-surveyor]

All animals but humans have sensitive olifactory receptors that can warn them of deleterious substances.

(humans may have such senses too, but just ignore them)

[editor-surveyor]

>> “I understand that owls can hear a mouse burrowing under the snow” <<

.
My cat can hear a small mouse or rat slipping through the grass 50 feet away, and go directly to them without fail.