My take. Looks like the swallow is 
. 
1. PhotoFlow → HL mode (blend) → linear Rec2020 (no clipping) → 32f
2. gmic → fill unwanted pixels → adjust brightness, contrast (curves on subject) → contrast enhancement (on detail) → adjust chroma (curve) → crop → adjust contrast (curve) → sharpen (LoG) → resize
Zoom 100% to enjoy!
