thank you Jaques. It is Mongo's favourite as well. It was processed in the normal way only.
Akira, after your question, Mongo also goggled swallows and found a great deal of variation in the colours. Some have no orange at all or have white instead of the orange and many other variations.
Mike, very good close guess as to why the are called "welcome" swallows. It seems the name ‘Welcome’ swallow comes from sailors who knew that the sight of a swallow meant that land was not far away. Although, in some parts of the world, Mike's reasoning for their name may be correct. Mongo only just found that out from looking into some of the questions raised about its name.
thanks all for your interest and comments.
Mongo was also very surprised that these were also from the swallow family - "woodswallows"). D800, nikon AFS 300mm f4 @ f8, ISO 400, 1/400th, -o.3EV