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Purple Sandpipers are great little birds...dumpy, stocky little waders with short legs and often a rather hunch-backed appearance, as they feed. In comparison, Redshank are taller, longer-legged, longer-necked, straighter-billed and generally more elegant.
But give me a Purple Sandpiper any day!
My Flickr photos...
Lat/Lng: 50.7791, -1.0914
OS grid ref: SZ641981
Among rocks on the slope near Southsea Castle