samchang 6/05/2013 23:46
pls id
Po Toi, 4May. Is it just a Common Sandpiper? The color and pattern on the back made me feel it may not be, also the black patch under the wing seems strange.
HFCheung 7/05/2013 11:29
Yes, it is. Very few waders have barred pattern on the back.
ajohn 7/05/2013 12:45
The upperpart pattern may look different because it is getting breeding plumage, so is more barred on the back than they would be in winter. The dark patch under the wing is shadow on the rump visible because the wing is slightly raised.
samchang 8/05/2013 21:48
Thanks all for the explanation!