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Lesser Whistling-Duck - Rusman Budi Prasetyo
报告

作者

日期

eBird记录 S65129001

地点

Bozem Wonorejo (-7.3087, 112.821)
Jawa Timur, Jawa, Indonesia
该地点产生的媒体文件 配图名录
地图
地图 坐标: -7.3087, 112.821
年龄
未说明
性别
未说明

媒体文件注释

This chestnut brown duck is confusable only with the fulvous whistling duck (D. bicolor) but has chestnut upper-tail coverts.....unlike the creamy white in the latter. When flying straight, their head is held below the level of the body as in other Dendrocygna species. The crown appears dark and the sexes are alike in plumage. They fly slowly but with rapid wing-flapping and usually produce a repetitive wheezy seasick call as they circle overhead. They are very nocturnal and often rest during the day. The outermost primary feather has the inner vane modified. This has been said to aid in producing a whistling sound in flight, although this has not been supported by field studies. Elevation: 0 m. Date added to IBC: June 22, 2016.

合集

互联网鸟类收藏（IBC）

技术信息

型号
Canon EOS 60D
镜头
205-390mm
ISO
1600
焦距
390 mm
闪光
Flash did not fire, auto
光圈
f/8.0
快门速度
1/1600 sec
尺寸
1000 pixels x 667 pixels
原始文件大小
353.21 KB