Can you hear me now?

Common Grackle displaying. April 11, 2019, near Cornwall, Ontario.
Amazing how they puff up. The bird on top of the feeder is a non puffed up grackle.

Quiscalus quiscula
Grackles have a hard keel on the inside of the upper mandible that they use for sawing open acorns. Typically they score the outside of the narrow end, then bite the acorn open.
source - https://www.allaboutbirds.org/guide/Common_Grackle/

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