We used capture-mark-recapture data to assess winter philopatry by Harlequin Ducks (Histrionicus histrionicus) in Prince William Sound, Alaska, during winters 1995-1997 and 2000-2001. Philopatry was ...

WEST GLACIER, Mont. - Researchers at Glacier National Park and the University of Montana recently identified at 17-year-old male harlequin duck. It's a rare find, since the average lifespan of a ...

University researchers are on the hunt for sightings of a duck rarely seen in the Sierra Nevada. The harlequin duck is a distinctive waterfowl more known to Alaskans and residents of the Pacific ...

A species of duck native to the Pacific Northwest has been spotted bobbing in the waters off Sheepshead Bay for the past few days — marking a rare find for Brooklyn bird watchers, according to one ...

Once every few years, local bird watchers line the St. Clair River to get a view of a rare visit from a small flock of harlequin ducks. The shores of the local strait is perfect habitat for this sea ...

Scientists in Alaska have discovered that lingering oil from the 1989 Exxon Valdez spill is still ingested by some wildlife more than 20 years after the disaster. Scientists in Alaska have discovered ...

wilderness to winter along rocky ocean shores. Although only a few nests were found in the 20th century and the duck’s future looked bleak, the annual arrival of adults on the coast kept alive Valley ...

Recruitment is the process by which young birds are added to the breeding population. The two most commonly used methods to estimate recruitment in ducks are pair/brood counts, and fall age ratios ...