“The seas will turn red,” it prophesizes in the Bible, having to do with the anticipated Armageddon. The seas are turning red, not with blood, but with red tide phytoplankton. They’re also turning brown, purple, all of the colors in the spectrum except green for the same reason. And it all has to do with more and more nitrogen products entering the seawater with each passing day. Seven billion-plus humans, more than half of whom live only a few miles from any one of the four world oceans, produce an awful lot of nitrogen compounds as waste products.
The fall is under way; the great migration is heating up. During the next four weeks, the skies and seas will be teeming with all matter of winged and finned things heading south. The push is on.
Thus far, it's been mostly shorebirds, though a few warblers have been moving and there have been waves of swallows, flickers, robins, and catbirds passing through.