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A pair of penguins have embarked on a rampage at a German zoo, killing parents and chicks after zookeepers took their own rotten egg away.
The drama, which according to zookeepers is without precedent, took place at Dresden zoo in the capital of the eastern German state of Saxony on May 21.
Staff - Penguin - Couples - Eggs - Promise
Staff were at first delighted to learn that three Penguin couples were sitting on eggs, with the promise of baby penguins in the near future.
Two of the Humboldt penguin couples successfully hatched two eggs each, and began to raise the four chicks.
Egg - Pair - Egg - Egg
But the egg belonging to the third pair never hatched, and when it became clear that the egg had gone off, both the nest and the egg were removed.
But the decision infuriated the would-be parents, and when the keepers had left, they attacked another pair who had successfully hatched two chicks, driving them away from their nest and killing the two baby penguins.
Chicks - Point - Grams - Grams
Both the chicks had been until that point developing well, with one weighing 300 grams and the other weighing 500 grams.
Just four days later the two penguins struck again; this time attacking the other parents of the two remaining chicks.
Zoo - Killer - Parents
The zoo did not comment on why they had decided to leave the killer penguins with the remaining parents.
This time the two penguin parents, both older birds, tried to defend the young, and died apparently from shock at the brutal attack by fellow penguins.
Sacrifice - Killer
Their sacrifice however kept the killer penguins away from...
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