What is generally described about the plumage of the Hudsonian Whimbrel compared to the Eurasian form?

Answer

It is often described as having slightly richer or darker tones.

The Hudsonian Whimbrel is often described as having slightly richer or darker tones to its plumage compared to its Eurasian counterpart, which may sometimes appear slightly paler overall.

What is generally described about the plumage of the Hudsonian Whimbrel compared to the Eurasian form?
speciesbirddifferenceavianwhimbrel