Our experience on the Farnes was totally the opposite: almost every Puffin brought sand eels back with them. This year there certainly doesn't seem to be a shortage of this, the favoured food-item of many of our seabirds: we saw several Puffins carrying over twenty at a time!
I noticed a curious piece of behaviour and wondered if it has been commented on before. As the Puffins arrived back at the islands with food for their chicks ('Pufflings'!) gangs of Lesser Black-backed, Herring and Black-headed Gulls were waiting to steal their sand eels. It seems that many of the Farne Puffins have adopted the strategy that Guy Gibson used over the Ruhr Dams during WW2: as one of the aircraft in his squadron flew in to make its attack, he flew alongside in his Lancaster to draw some of the anti-aircraft fire and confuse the German gunners. On many occasions I watched pairs of Puffins fly in towards the nest colony, one carrying fish, the other not. At the last moment, the fish carrier dropped to its burrow, while the other zoomed past. This happened too often to be a coincidence...
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