Unlike its relative the ring-necked parakeet, which is the UK's only naturalised parrot, the doomed species builds huge communal nests.

不像它的同类环颈鹦鹉，英国唯一的本土鹦鹉，这种鹦鹉天生喜欢建造巨大的公共巢穴。

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At least three other parakeet species have established feral breeding colonies: the most numerous is the ring-necked parakeet, now common in many London parks and suburbs.

数量最大的是现在常见于伦敦很多公园和郊区的环颈鹦鹉。

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The report was also able to follow the movements of a ring-necked parakeet around London, as the British range of this colourful bird expanded.

ECONOMIST: The oldest bird in the world