It will be interesting to see what happens to this bird. If it has survived for a couple of weeks there is a chance it could survive long term and perhaps reorientate to find it's way back to the Dee, Mersey and Alt estuaries where it spent last winter. Time will tell however it certainly needs to update its satnav.
What an islandica Knot is doing on the Azores is somewhat of a mystery. On the Azores Knot occur regularly but in very low numbers. Given the location it is likely most records are rufa Knot that have been caught in storms and blown over the Atlantic. Given the proximity of the breeding ranges of rufa and islandica it is likely there is occasional mixing of immature birds in autumn however an adult is quite a different matter.
This is the first record of a BTO ringed Knot on the Azores and is only the 3rd British ringed Knot to be found in any of Portugal. Only one Portuguese ringed Knot has been found in the UK which was found in August 2013 in Lincolnshire which, remarkably, I was also involved in catching. These low totals are probably not surprising as few islandica knot make it as far south as Portugal and relatively few canutus Knot stop off in the UK in spring and autumn.
Many thanks to Peter Fearon, Carlos Ribeiro and Tiago Rodrigues for photographing this bird and getting the data submitted.