灰冠鸦雀巢及巢址生境的首次报道

灰冠鸦雀(Paradoxornis przewalskii)是狭域分布的中国特有鸟种,分布区仅局限于岷山北部。近年来关于该种的新发现为我们提供了其栖息地和现有分布范围的宝贵信息,但该种的繁殖情况还从未有观察与报道。2013年6月10日,我们在四川省唐家河国家级自然保护区内发现1对正在育雏的灰冠鸦雀及其3只新生雏鸟,对其巢址生境和巢的结构进行了详细记录。灰冠鸦雀筑巢于稀疏的岷江冷杉(Abies faxoniana)和红桦(Betula albo-sinensis)混交林下的浓密缺苞箭竹(Fargesia denudata)丛中,巢址海拔2700 m,位于陡峭阳坡接近林线处。巢为结构精细的杯状巢,高约6.6 cm,深约5.0 cm,巢口内径4.8 cm,外径7.0 cm。巢由干草叶与竹叶编织而成,巢壁外侧装饰有大量绿色苔藓。本报道为灰冠鸦雀野外繁殖的首次记录,为今后深入开展该珍稀鸟种的繁殖生态和栖息地选择研究提供了基本信息。

First Report on the Nest and Nesting Habitat of Rare Rusty-throated Parrotbill Paradoxornis przewalskii, China

Rusty-throated Parrotbill (Paradoxornis przewalskii) is endemic to China with a severely restricted range in northern Minshan Mountains. Recent discoveries provide us valuable information on its habitat and current distribution, whereas no observation on its breeding has been reported. We observed one breeding pair of Rusty-throated Parrotbill and their three newly hatched offspring on June 10, 2013, at Tangjiahe National Nature Reserve, Sichuan Province, and documented their nesting habitat and nest structure. The nest was located in dense Fargesia denudata bamboo undergrowth with sparse Abies faxoniana and Betula albo-sinensis canopy, located close to the tree-line at 2 700 m asl on a steep south-facing slope. The elaborate cup-shaped nest was 6.6 cm of height, 5.0 cm of depth, 4.8 cm of inner diameter and 7.0 cm of outer diameter. The nest was constructed from dry grass and bamboo leaves, decorated with green moss. This report provided basic information to guide further studies on the breeding ecology and habitat selection of this rare species.