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It is not always the case, it is not unusual that they change the way they sound. "Bird chirping" can roughly be divided into bird song and bird calls. Bird son
by mongol 7y ago
It is not always the case, it is not unusual that they change the way they sound. "Bird chirping" can roughly be divided into bird song and bird calls. Bird songs are for the most part relaxing, while bird calls are often used for warning purposes. Bird watchers learn to look out when the birds in an area change from the first to the latter. For example, I once looked around in this circumstance and soon saw an owl with a dead bird in its claws. I am not surprised that other animals, such as squirrels, learn to make the association too.
- grawprog 7y agoTo add to this, songbirds also sometimes engange in mobbing when predators show up. Different species will all flock together and bombard the predator. I've watched it happen to my cat before when he was chasing chickadees around. All the birds in the yard ganged up on him and chased him off. He's not a very good hunter, so the birds weren't really in danger either way. One of my biology teachers mentioned if you make the right noises while walking through the forest, you can trick the song birds into thinking you're a predator and see the phenomenon for yourself.