Fuck if I know. Where I work we have a pier that goes out like 100 yards. Plus or minus 10 or so. At the very end when the birds start to migrate down by the lake they cover the whole pier at the end where you can sit down or go fishing with nothing but bird shit. It looks like some huge ass bird han an explosion and it went all over the pier. Its so gross. Good thing it is only like that for about a month.