The reason is that the plover is a symbol of longevity in Japan because the bird’s cry onomatopoeia, chiyo, is a homonym for “chiyo” 千代, a word meaning “1000 generations".
EXIF info:
Nikon D700
Lens: VR 28-300mm F/3.5-5.6G
Focal Length: 36mm
Aperture: F/6
Shutter Speed: 1/800s
ISO Sensitivity: ISO 250