"Atmospheric Rivers" is another one of those BS meteorological terms I loathe...it's just a lot of rain!
But anyways, the birds seem to enjoy it for the most part. Sure, they'll hide during the heavy parts, but when it breaks for a bit, they'll all come out in full force. The rain stirs up a lot of seeds on the ground, not to mention a bevy of insects for the ones who prefer those (thrashers, flickers etc.).
People in CA are going to have to break free from past behaviors and start building differently e.g. not right up against riverbeds, on flood plains etc. The media is a
huge problem in this regard--they're reciting a fictional "drought" narrative ad nauseum (even when snowpack is triple normal, grass is already green, and entire towns are under water), but the reality is that this whole region is getting wetter, not just during the winter, but at other times of year too. Sure, certain parts flood every winter no matter what, and it's tragic and unfortunate when it happens, but these kinds of things are going to become more and more prevalent, and folks will have to see that reality and adjust accordingly. Imagine what a blessing it will be when the CA deserts become more habitable! I bet there's an off-the-charts wildflower bloom out there this spring...
Okay, soapbox vacated. Happy smokes!!