Trogg - I agree that both are well worth a look and thank you for the links.
I was fishing Saturday and passed by the small island where most of our resident population of Black Death have chosen to roost. Last year it was obvious that some of the island vegitation including some trees were dead or dying (from cormorant feces). No way to tell over the winter but now with Spring having sprung here and the trees putting on leaves it became evident that very little on the island is still living. The trees are whitish with bird poop and no sign of them putting on leaves. Some low-lying scrub appears to have survived so far but I doubt it will live thru the summer.
I left the area near sunset and the trees were pretty much black with birds. Luckily the lake is more than large enough to not notice the fish they take but it is interesting they have chosen an area where the spawning carp will be the thickest in a week or two when they are in full spawn.