P1: You can see that the wader showed spotted on its back. Prominent supercilium. This is Wood Sandpiper
P2: Brown above, white beneath, with sharply demarcated brown area on upper breast. Showed typical structure of a Common Sandpiper
P3: Yellowish-green legs with rather long tibia. Greyish above and white beneath. This two birds should be Common Greenshank.
P4: There are several species of waders in this picture. The birds showed a rather bigger size in this photo should be Common Greenshank. Those characters of CGSh I mentioned before. The birds with red legs should be Common Redshank.Brown or greyish-brown upperpart showed in this picture also the other character for id the Common Redshank. If you can see the bill of this species, it will showed a thick and straight red-colored bill. Another bird with greyish upper part and relatively long, fine bill should be Marsh Sandpiper. The birds with brownish tone on their upperpart and breast should be breeding plumage of Curlew Sandpiper.
P5: Yes
P6: As I mentioned before, I think that you know what is this
P7: I think you mean the bird in the right hand side of the picture. This is a Curlew Sandpiper. We can see some other Curlew Sandpiper showed more non-breeding plumage in this picture. In Spring that we can find many of wader molting to breeding plumage, I think this will make confusion to many people.
P8: Also, I think you will know this bird.
