“Chickadees hammer on seeds to open the shell to reach the nutritious nugget inside. This is unlike sparrows and grosbeaks that crack open seeds in their bill.
ML Video #447525; video recorded by Eric S. Liner; audio recorded by Matthew D. Medler.
For more bird videos and sounds, explore the Macaulay Library at the Cornell Lab of Ornithology. http://macaulaylibrary.org
For additional identification and life history information visit: https://www.allaboutbirds.org/guide/Black-capped_Chickadee“