Metadata
Author: MultiUn
Data
English[en]
In # scientists reported an alarming # per cent decline in the number of wirebird, a rare species found only on St. Helena # wo possible explanations were offered: the degradation of the bird's grassland habitat, caused by the declining numbers of grazing animals; and an increase in the number of predators, such as cats, rats and myna birds
Chinese[zh]
年,科学家作出惊人的报告,称圣赫勒拿岛上独有的一种珍稀物种圣赫勒拿鸻数量减少了 # %。 # 对此他们提出了两种可能的解释:这种鸟的草原生境退化,而造成这种退化的原因是放牧动物数量不断减少;猫鼠和家八哥鸟等掠食类动物数量增加。