Resources related to Species of Concern

Holocene underkill, Pleistocene Overkill, Chendytes lawi

PNAS March 18, 2008 vol. 105 no. 11 4077-4078
For many years, it was widely assumed that Chendytes had been lost toward the end of the Pleistocene, even though there were early reports of material from archaeological contexts. Survival well into the Holocene became clear in 1976, when G. V. Morejohn (11) reported C. lawi bones in an archaeological site north of Santa Cruz, California dated to between 5,400 and 3,800 14C years ago. He estimated that the extinction of this bird had occurred between 2,500 and 3,000 years ago.

At Sea Distribution of Spectacled Eiders: A 120-Year-Old Mystery Resolved

ABSTRACT.-The at-sea distribution of the threatened Spectacled Eider (Somateria fischeri) has
remained largely undocumented. We identified migration corridors, staging and molting areas, and
wintering areas of adult Spectacled Eiders using implanted satellite transmitters in birds from
each of the three extant breeding grounds (North Slope and Yukon-Kuskokwim Delta in Alaska and
arctic Russia). Based on transmitter locations, we conducted aerial sur­ veys to provide visual