Hudsonian Whimbrel

That's what the British Ornithologists' Union has renamed the North American population of Whimbrel. According to that particular taxonomic authority there are sufficient morphological differences to justify a split from the Eurasian populations (which the BOU now refers to as Eurasian Whimbrel).

The Bird Formerly Known as Whimbrel

Currently there is no similar proposal before the AOU but perhaps there will be one in the near future.

Interestingly, at the Toronto Whimbrel watch last week a Eurasian Whimbrel was observed and photographed. You can read more about it from Jean Iron.