What makes some species so vulnerable?
Species like Red Knots and Dunlin that concentrate in large numbers in a single area are obviously vulnerable. Loss of a critical staging area could mean the destruction of a whole flyway population of shorebirds. Example: The 30,000 Red Knots feeding on horseshoe crab eggs in Mispillion Harbor, Delaware Bay, are highly vulnerable to human alteration of this resource, or even a catastrophic storm.
