What does it mean when a crow crows outside the window?

Weather changes and environmental abnormality signal transmission.

1. Weather changes: When the weather changes, the wings of insects will be affected and become less flexible. Crows are birds that rely on hearing and vision to judge the safety of their environment, so they may be attracted to windows due to impending severe weather. At this time, crows will chirp by the window to alert others to the changes in the weather.

2. Environmental abnormality signaling: In some cases, if a group of other animals or birds find that their food source is threatened, they will often warn other individuals through sounds in order to seek help. Survive in the same way as defense or protection of poultry. Therefore, crows cawing outside the window are the transmission of weather changes and abnormal environmental signals.