A stealthy approach and wait a few minutes, and there you go! Image taken in the back garden.
Olympus : E-M1X
Lens focal length : 420 mm
Focal length in 35 mm film : 841.0mm
Metering mode : Pattern
Shutter speed : 1/500 sec
Aperture : F8
Exposure mode : Manual exposure
ISO : 640
Exposure bias : -0.7 EV
Flash : OFF
ACR + PSCC