very small birds, maybe just 50mm length from beak tip to tail.
Camera Info
Device: Nikon D7100
Lens: VR 150-600mm f/5-6.3G
Focal Length: 600mm
Focus Mode: AF-A
AF-Area Mode: Single
VR: ON
AF Fine Tune: ON(0)
Exposure
Aperture: f/7.1
Shutter Speed: 1/640s
Exposure Mode: Manual
Exposure Comp.: 0EV
Exposure Tuning:
Metering: Center-Weighted
ISO Sensitivity: Auto (ISO 140)