ML502339921

年龄

未说明

性别

未说明

观察细节

in flight. My notes say "somewhat pinched in wing bases and (apparently unlike Besra) white tail bands broader than dark tail bands". However, the statements regarding the tail are incorrect/misleading. On the one hand, Jo Ann's photograph shows that the dark and light tail bands are almost of equal width (dark bands only slightly narrower). On the other hand, eBird photos of flying birds show that white tail bands of Besra, while usually broader than dark bands, are sometimes of almost equal width (e.g., ML 476974981, ML58147121, and ML36094711); they are usually much broader in Eurasian, Chinese and Japanese Sparrowhawks (Chinese Sparrowhawk, does not have pinched in wing bases based on eBird photos). Chinese Sparrowhawk said to have incomplete dark tail bands and both it and Japanese have long primary projection in flying birds vs short in Besra. Besra has 5 fingers (including the short outer primary, confirmed by eBird photos) vs Crested Goshawk's and Eurasian Sparrowhawk's 6 fingers (eBird photos; eBird photos also show Chinese Sparrowhawk has 4-5); Jo Ann's photo shows 5 fingers. Jo Ann's photo also shows that banding on underside of primaries is much less bold than the banding on underside of secondaries, but this must be an artifact unlike in any Taiwanese Accipiter. Most resembles Besra ML58147121 and ML36094711 and ML249874021. Conclusion: not Crested Goshawk or Eurasian Sparrowhawk because of "finger count". Not Chinese or Japanese Sparrowhawks because of rounded wingtip (short outer primary not too much shorter than the rest and second-to-last primary not too much shorter than the others). Original photo by Jo Ann Mackenzie and cropped and color-enhanced version of same photo.

技术信息

型号

NIKON D70s

焦距

400 mm

闪光

Flash did not fire

光圈

f/8.0

快门速度

1/5000 sec

尺寸

1920 pixels x 1128 pixels

原始文件大小

591.79 KB