Are long-term trends in Bewick’s Swan Cygnus columbianus bewickii numbers driven by changes in winter food resources?
WOOD, KEVIN A., NEWTH, JULIA L., BRIDES, KANE, BURDEKIN, MIKE, HARRISON, ANNE L., HEAVEN, STEVE, KITCHIN, CHARLIE, MARSHALL, LEIGH, MITCHELL, CARL, PONTING, JESSICA, SCOTT, DAFILA K., SMITH, JON, TIJSEN, WIM, HILTON, GEOFF M., REES, EILEEN C.
Published in Bird conservation international (01.09.2019)
Published in Bird conservation international (01.09.2019)
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