鸚鵡與巢

(這是大約三四年前潘耗子的 po 文了)

這幾天閒閒無聊，找了一些文章來看
非常有趣的一項野外調查報告
其中！下面這一篇提到～
背景是西澳
四個種類的鸚鵡與一個種類的巴丹
根據科學家的測量，牠們巢的所在的那棵樹，樹齡介於七十三至一千三百年之間
噗噗
值得深思 :-({|=
看官們！請自行體會 :salute:

原文如下
Size and Age Parameters of Nest Trees Used by Four Species of Parrot and One Species of Cockatoo in South-west Australia

PR Mawson and JL Long

Abstract


The size and health of hollow-bearing eucalypts successfully used by four species of parrot and one species of cockatoo in the south-west of Western Australia are described. The estimated age of these nest trees based on known growth rates is given and ranged from 73 years to over 1300 years. The lowest average estimated age of nest trees recorded for any of the parrot species was 275 years, and 446 years for the cockatoo species. In view of current timber production strategies and management policies for remnants of native vegetation there is a real possibility that nest hollows may be in limited supply in some areas in the near future. To ensure a continued supply of nest hollows for parrots it will be necessary to modify existing timber production strategies in forests, develop new strategies for managing isolated remnants, undertake research into the value of artificial nest hollows to supplement dwindling supplies, and encourage further community involvement in the management of small remnants of native vegetation.