SYDNEY, Australia — Climate change is being blamed for a changing of the guard among Sydney's cockroach population.

Researchers say the most common sub-species in city households was the german cockroach, until it disappeared about seven years ago.

Martyn Robinson from the Australian Museum says the Australian house cockroach, methana marginalus, which likes warmer climates, has begun moving in.

"It's most likely to be the...warmer climate," he said.
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