Grackles have strong jaw muscles able to crack open chestnuts, beechnuts and acorns in the bill. They are also known to saw acorns and dried corn into smaller pieces using the sharp keel of a horny plate on the bill.
Some grackles have shown the ability to learn figuring out if they follow robins, they will get chances to steal worms.
Grackles have strong jaw muscles able to crack open chestnuts, beechnuts and acorns in the bill. They are also known to saw acorns and dried corn into smaller pieces using the sharp keel of a horny plate on the bill.