After all that time of filling feeders and having so many birds all the time, we suddenly just have one or two coming around. Also not hearing all the bird songs on the river. Can't figure it out. We are having a bit of a heatwave, 95 today which is very unusual for us. Could that be it? We even have less squirrels, stellar jays and crows. Can't remember this ever happening before. Perplexing.