<a href="http://emma-townshend.livejournal.com/4094.html">Emma Townshend: Leylandii: bad for sparrows, good for twitchers</a>

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Reports last week of a new three-year study on garden bird numbers suggest that ornamental hedging may be partly responsible for the dramatic decline in house sparrows, as imported aliens like Leylandii play host to few native insects for the increasingly scarce little birds to feed on.