A growing flock of parrots could pose a threat to native British birds.
Experts say the number of wild parrots in Britain has reached 20,000 as many have been released by their owners. That could reach 100,000 by 2010.
Ring-necked parakeets cause a lot of trouble, as experts say their numbers are rising by 30% yearly, challenging local owls, starlings and kestrels.
This is partly because they nest before British birds, taking the best nesting sites, and have more chicks.
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