What does it mean If I bird continuously knocks on your window to get your attention a random bird I was told it's bad luck?
Actually, they see their reflection in the window! They become territorial, and start pecking at the window to scare of his "rival"!!
It's a good luck! It's someone you knew from the past that past away..The soul is saying hi
Sometimes, birds will see through the clear window pain and believe they can fly into that space . People put up decals to alert birds to the eminent danger before them.