Nikkor 200-500 VR/TC 14 III @700mm, f9, ISO 560; D750 minor crop (< APS-H); the depth of sharp focus (DOF) is measured in mm at this setting; for a small kingfisher @f8 close-up it's less than 1 inch, for a small monkey @f8 2-3 inches. Loose tripod head/VR. Zoomed into the uploaded file (before scaling) reveals horizontal rows of the scales in the texture of the wing.
Nikkor 70-200/4 VR @135mm, f8; D600
Nikkor 200-500 VR/TC 14 III @500mm (with TC), f9, ISO 3200; D750 minor crop, Cream-coloured giant squirrel