noun
black-bellied plover; grey plover
A migratory shorebird (Pluvialis squatarola) found in Japan; the name is usually written in katakana.
干潟でダイゼンの群れを見つけた。
I found a flock of grey plovers on the tidal flat.
The Japanese name ダイゼン is likely derived from the bird's call or appearance, but the exact origin is uncertain.