Behaviour of wintering Tundra Swans Cygnus columbianus columbianus at the Eel River

• Main Authors: Jeffrey M. Black, Carol Gress, Jacob W. Byers, Emily Jennings, Craig Ely
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Todd; Cygnus columbianus; Tundra; Tundra Swan; Alaska
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.701.7715; http://www2.humboldt.edu/wildlife/faculty/black/pdf/Black%202010%20TUSW%20Wildfowl.pdf

Tundra Swan Cygnus columbianus columbinanus phenology and behaviour at the Eel River delta and southern Humboldt Bay in northern California, USA, is described. Counts made each January from 1963 onwards peaked at 1,502 swans in 1988. Monthly counts recorded during the 2006/07 and 2008/09 winters pea...