5]N) reveal associations among geographic location and condition of Alaskan Northern Pintails
Northern pintails showed up in phenomenal numbers across their primary breeding range last spring.
2011 Percentage of Change 2010-2011 2011 Compared to Long-Term Average Mallard 9% 22% Gadwall 10% 80% America Wigeon -14% -20% Green-winged Teal -17% 47% Blue-winged Teal 41% 91% Northern Shoveler 14% 98% Northern Pintail 26% 0% Redhead 27% 106% Canvasback 16% 21% Scaup 2% -15%
The breeding population of northern pintails in North America has declined since the 1970s (United States Fish and Wildlife Service, in litt.
Johnson and Grier (1988) concluded that 60% of migrating northern pintails in North America pass through northwestern Montana and southern Alberta during spring or proceed directly to far-northern breeding grounds.
MATERIALS AND METHODS--We captured northern pintails along the southern coast of California at Point Mugu, Ventura County.
We used a baited rocket-net and a swim-in funnel trap (Schemnitz, 1994) to capture northern pintails on the duck club at Ventura County Game Preserve at Point Mugu during 18-20 February 2001.
We acquired data from satellites to monitor movements of northern pintails, in which polar-orbiting environmental satellites (NOAA) monitored signals from the PTTs and re-transmitted data to Argos, Inc.
Only mallard, common shelduck (Tadorna tadorna), northern pintail
(Arias acuta), and Eurasian teal (A.
Decoy trap bias and effects of markers on reproduction of Northern Pintails
Five species of indigenous North American ducks were used in this study: mallard (Anas platyrhynchos), northern pintail (Anas acuta), blue-winged teal (Anas crecca), redhead (Aythya americana), and wood duck (Aix sponsa).
dagger]) HPAI, highly pathogenic avian influenza; BWT, blue-winged teal; RD, redhead; WD, wood duck; MD, mallard; NP, northern pintail, LG, laughing gull; Mongolia/05, A/Whooper Swan/Mongolia/244/05; Anyang/01, A/Duck Meat/Anyang/01.