9Wi 9/10/2016 16:58
歐夜鷹 ? European Nightjar ?
日期 : 2016-10-08
地點 : Wetland Park
Eqpt. : D7100 + Sigma 120-300mm f/2.8 Sports + 1.4x
[img]https://c7.staticflickr.com/6/5247/29911622550_b8c472ecba_k.jpg[/img]
[img]https://c1.staticflickr.com/9/8579/29911624440_ed8538e80f_k.jpg[/img]
[img]https://c8.staticflickr.com/6/5442/29578194383_77ad3fc928_k.jpg[/img]
ajohn 10/10/2016 17:33
I don't see any reason to suggest that this is a European Nightjar, which would be an exceptional record in East Asia, rather than Grey Nightjar, which is a regular passage migrant.
The two are similar in plumage, as are many nightjar species, but for me the following features point towards Grey Nightjar:
- Lesser Covert pattern. The coverts show a pattern of buff spots towards the feather tips. European Nightjar should show an obvious white bar across the coverts.
- Scapulars. Photos of European Nightjar typically show a band of black and white feathers across the scapulars, creating a stripe along the side of the mantle. This seems to be lacking in your bird, which instead has black tips to the scapular feathers.
You're lucky to get such a good view of the bird - it's really difficult to see nightjars during the daytime.
European Nightjar:
[url]http://orientalbirdimages.org/search.php?Bird_ID=584&Bird_Image_ID=32928[/url]
[url]http://orientalbirdimages.org/search.php?Bird_Image_ID=57418&Bird_ID=584&Bird_Family_ID=&Location=[/url]
Grey Nightjar:
[url]http://orientalbirdimages.org/search.php?Bird_Image_ID=116954&Bird_ID=576&Bird_Family_ID=&Location=[/url]
9Wi 11/10/2016 10:03
[quote]Original posted by [i]ajohn[/i] at 10/10/2016 17:33 [url=http://www.hkbws.org.hk/BBS/redirect.php?goto=findpost&pid=76749&ptid=25429][img]http://www.hkbws.org.hk/BBS/images/common/back.gif[/img][/url]
I don't see any reason to suggest that this is a European Nightjar, which would be an exceptional record in East Asia, rather than Grey Nightjar, which is a regular passage migrant.
The two are simil ... [/quote]
Many thanks for clarification. 3551f6eb47d3445 3551f6eb47d3445 3551f6eb47d3445