Changes

We've all been hearing alot of news about birds lately, so it didnt take long to catch my attention earlier when I was sitting in my room & the screeches & chirping of birds became so loud I could barely hear myself think. I ran outside to see where they were & in the woods behind my house the trees were nearly black with birds & the sound was deafening. Ive seen alot of birds in my time, but never this many at once. It leaves me wondering- whats really going on with the birds & other animals- are they aware of something that we're not?