The birds are acting.. strange?

Hii all!!

Has anyone else noticed the birds in the states being a bit off lately? 

I get climate change is happening and all that but well over a hundred or so crows were circling today just over a few houses, not leaving and or migrating but just circling in the air. Some were falling out of the sky and it looked like others were fighting while some of them were just clustering up a few trees around my home. 

I was thinking maybe someone did something to upset them? I know that when someone hurts a crow they remember that, and they can bring other crows to somewhat get their revenge, but this was.. A LOT of them. multiple trees looked like they were full of leaves again when it was just birds, and it looked like it was something out of bird box? (Horror film) Just without them smacking into the windows.. I could just be overthinking it and being a bit paranoid but i just got bad vibes from it. Something seemed genuinely wrong.