The heron appears to be 'one-legged', but this 'unipedal resting pose' is common to many large wading birds such as herons and flamingoes. The most probable explanation is that the bird is conserving body heat in this pose.More pictures of Caversham by Edward Lever...
Camera Make: Canon Model: Canon EOS 6D
Exposure Program: Manual, Focal length: 300 mm, Aperture: f 8, ISO: 200, Exposure time: 1/400 sec, Metering Mode: Multi-Segment, Exposure Bias: 0 EV
Date/Time Creation: March 15, 2018, 4:01 pm
Exposure Mode: 1,
ImageID:1218543, Image size: 3000 x 2000 pixels
A really excellent shot Edward
Thank you, Paul, for your kind comment. I was lucky to get that shot before he flew off, because herons are usually quite wary.
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