This video from New York state in the USA says about itself:
28 February 2017
In this short clip, a group of Common Grackles previews the diverse behaviors that we’re sure to see more of as spring arrives. First, notice the male on the feeder exhibit a song spreading display before exchanging a threatening bill-up posture with a new arrival. Such displays will become more frequent (and more intense) during the onset of the breeding season when the birds begin to pair up and establish territories.
Watch LIVE at http://AllAboutBirds.org/CornellFeeders for news, updates, and more information about the pond and its surroundings.
This FeederWatch cam is located in the Treman Bird Feeding Garden at the Cornell Lab of Ornithology.