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Are yearlings distinguishable from older red necked phalaropes?

, : Are yearlings distinguishable from older red necked phalaropes?. Journal of Field Ornithology 59(3): 235-238

Contrary to Prater et al. (1977), wear on primaries was not useful in separating yearling from older Red-necked Phalaropes (Phalaropus lobatus). Yearling and older males differed significantly in weight, but not in bill-length or wing-length. A weight:wing-length ratio provided the best, but not a complete, separation of age classes.


Other references

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