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Round goby and loon deaths
Loons and other migrating birds have been dying from a new cycle of botulism poisoning in the Great Lakes since 1999. Early reports came from Lake Erie, but spread in succeeding years to Ontario, Huron and Michigan. In many cases the deaths began to occur shortly after round gobies, an invasive fish species, had taken over an area. The gobies pass the botulism toxin through the food chain to birds after consuming tainted quagga or zebra mussels.
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