expression
indistinguishable; hard to tell apart
Rare idiomatic expression comparing something to a white egret in snow, where the two blend together and become indistinguishable. Used to describe things that are so similar they cannot be told apart.
「雪に白鷺」とは、雪の中の白鷺のように見分けがつかないことを言う。
'Yuki ni shirasagi' refers to something being indistinguishable, like a white egret in the snow.