Green Sandpiper

Thanks Pedro, then I'm going with the green sandpiper!

It's a Green Sandpiper. Common Sandpipers have a white patch that extends sideways from its chest to its neck that this doesn't have.

Thanks Liam, I will compare these 2 species and see which one fits.

Common should have a darker superlora and the dark eyeline should extend beyond the eye.

Thanks a lot for the ID and especially for the information. That's important always to remember!

It looked a bit like Green Sandpiper but the legs appear grey in the picture and the cap is plain brownish rather than dark and light grey stripes which is why I went for Common Sandpiper.