Which subspecies typically exhibits a shorter bill length compared to European forms?
Answer
Hudsonian Whimbrel (N. p. hudsonicus)
The length of the Whimbrel's signature bill is highly variable and serves to differentiate various subspecies across the species' extensive range. A specific example provided is the Hudsonian Whimbrel, designated scientifically as *N. p. hudsonicus*. This particular North American form typically possesses a bill that is shorter in length when compared directly to the bill measurements found in the European or Asian subspecies populations.
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