possible juvenile limosa

counting the juvenile Icelandic Black-tailed Godwits in the flock of 3500 birds I came across this bird which seems to be a possible nominate juvenile limosa the subdued colouration on the head and underparts, the limited pattern in the coverts and tertials / scapulars and the heavy bill? all seem to be suggestive of limosa but could it fall withint he range of variation in islandica ?

The photos are poor as the bird was distant in heat haze and looking into the sun -- I have included a fairly typical juvenile islandica in all photos with two birds in the bottom shot for comaprison