Darktable/Gimp how to fix daylight photos shot with Flash white balance

Processing Play Raw
13

White balanced for daylight (4014 K).

DSC_8957_04
DSC_8957_041920×1273 1.56 MB

Edit: Added some saturation after looking up these birds. But I doubt that the dark feathers of an avocet are really black. I would think it’s a very dark brown.
DSC_8957.NEF.xmp (7.9 KB)