A comparison of the unseasonal DBP of 2015 with the current one is shown below.
Comments: First discount the colour tone. The colour is untouched. The 2015 photos were taken in light overcast, the 2017 ones in golden early morning sunlight. The birds are similar but not identical. I am not qualified to say whether
they are adults in seasonal non-breeding plumage or immatures. However one would not expect an immature from the last breeding season to arrive before adults. It would help to know whether, in each case, the bird was here over the whole of spring/summer.
