There is a reason why this hummingbird is called the “ruby-throated”…
A hint of flash emphasizes the iridescent color of its throat.
1/100 s, f/6.3, ISO 400, @ 600 mm (DX mode 900 mm), -1/3 EV, flash -4 EV; with Nikon D750, Sigma 150-600mm / f5-6.3 DG OS HSM S, Induro GIT 404XL tripod, Induro GHB2 gimbal head, Nikon SB 800 speed light, MAGMOD MagBeam flash extender;