Shokingly similar to @heckflosse’s with the slight difference that he just used a curve and I used a ton of stuff. So if you want to learn how to be ineffective…download my pp3 file.
I couldn’t seem to get the tones I was after with base curve and/or tone curve, which I was using as I’m not yet confident with Filmic. But I switched to Filmic and things fell into place quickly after some slider dragging.
I found that darktable’s Defringe module helped a lot with the chromatic aberration(?) around the gull. Before and after:
I applied another instance with stronger settings to the tail with a drawn, feathered mask to get rid of more unwanted green and magenta.
Equalizer with a mask to bring out feather detail in the breast and head. And I’m a sucker for Soften (with substantially reduced settings as compared to the defaults!), which I applied to the inverse of the same mask.
Spot white balance on the breast, giving a warmer feel, and some good ol’ Velvia.
Darktable, then some GMIC sharpening on the feathers only and Liquid Rescale in Gimp to extend the canvas and put the eye at a “rule of thirds” crosspoint.