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[Nightjar] 歐夜鷹 ? European Nightjar ?

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





隨緣為經,量力為緯;有緣無力是枉然,有力無緣也徒然。

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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:
http://orientalbirdimages.org/se ... Bird_Image_ID=32928
http://orientalbirdimages.org/se ... y_ID=&Location=

Grey Nightjar:
http://orientalbirdimages.org/se ... y_ID=&Location=

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Quote:
Original posted by ajohn at 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 simil ...
Many thanks for clarification.
隨緣為經,量力為緯;有緣無力是枉然,有力無緣也徒然。

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