Thanks for your comments. Here is the original tweaked only by setting the contrast and microcontrast to 70 in PL3. These are probably the most natural colours. Colours do depend on whether the bird is front or rear illuminated. Its a real problem with back lighting with DO lenses, they are great for front lit subjects.Alan! Since I didn't have opportunity to shoot BIF (or just didn't look for it...) and since I really feel pain (somewhere) when the birds are not showing their natural colors, I decided to "kidnap" your photo and adjust it to my taste. Sorry about that and my apologies if you feel it wasn't appropriate! I'm going to send you the DXO PL3 file so you can see what I have done (I think you have the PL3 elite installed) - fast and simple.
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I have never seen a Nightjar flying. Well done!
Very nice shots Cog! Few ours ago I posted in the "Portraits" with ID for the terns - didn't check the BIF. Now I see you have the same ID here!