Wow man. I didn't know this was going on....
Overpopulation on Lake St. Clair islands: Thousands of double-crested cormorants are nesting, overwhelming local islands and transforming habitats.
Habitat damage: Birds' acidic guano (droppings) kills trees, leaving dead, barren areas where little else (turtles, frogs, ducks) can survive or nest.
Fisheries impact: Each cormorant consumes about 1 pound of fish per day (e.g., perch, bass, bluegills). Large colonies (e.g., 10,000 birds) equate to roughly 5 tons of fish daily, raising concerns among anglers and locals about declining sport fishing.
Apparently these birds were almost wiped out in the DDT massacre of ought five but now they've come raoring back and are wrecking Lake St. Clair which is a very rare and valuable freshwater environmment - unique in the world. Invasive species have decimated the Lakes....diversity is a lie.