Giant Mice Ravage the Land

Ordinary domestic mice, introduced by humans, are wreaking havoc on the bird populations of Gough Island, where no predators can stop them.

Mice in Gough Island killing endangered atlantic petrel bird | Global Animal


"There are about 1.9 million mice on an island that’s just 25 square miles (65 square kilometers). What’s more, the mice on Gough Island now grow 50 percent bigger than normal mice, reaching up to 10 inches (27 centimeters) long, not including the tail.


As other food sources diminish in winter, the mice turn to the huge numbers of bird chicks.


For example, mice have been known to attack and eat chicks of the Tristan albatross, a ground-nesting bird—even though an albatross nestling weighs 300 times more than a mouse."

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