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Long-term trends in numbers of Whooper Swans Cygnus cygnus breeding and wintering in Sweden

Nilsson, Leif LU (2014) In Wildfowl 64. p.197-206
Abstract
The Whooper Swan Cygnus cygnus was a rare breeding species in Sweden during the early years of the 20th century, when total numbers likely consisted of only 20 pairs. Recent decades have however seen a marked increase in numbers and a spread in the swans’ distribution, with the number of pairs breeding in the two northernmost provinces rising from 310 to 2,700 pairs between two main surveys, in 1972–75 and 1997. This paper documents continued long-term (1967–2014) increases in numbers of Whooper Swans breeding and wintering in Sweden, based on data collected by the Swedish Bird Monitoring Programme and during the mid-winter International Waterbird Counts (IWC). Most recent estimates for the country indicate that there are now 5,400... (More)
The Whooper Swan Cygnus cygnus was a rare breeding species in Sweden during the early years of the 20th century, when total numbers likely consisted of only 20 pairs. Recent decades have however seen a marked increase in numbers and a spread in the swans’ distribution, with the number of pairs breeding in the two northernmost provinces rising from 310 to 2,700 pairs between two main surveys, in 1972–75 and 1997. This paper documents continued long-term (1967–2014) increases in numbers of Whooper Swans breeding and wintering in Sweden, based on data collected by the Swedish Bird Monitoring Programme and during the mid-winter International Waterbird Counts (IWC). Most recent estimates for the country indicate that there are now 5,400 breeding pairs during the summer and close to 10,000 individuals present in normal or mild winters.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
field feeding, population trends
in
Wildfowl
volume
64
pages
197 - 206
publisher
Wildfowl and Wetlands Trust
language
English
LU publication?
yes
id
14d58ab8-3c75-4e27-8613-e2b8510e8c58
alternative location
http://wildfowl.wwt.org.uk/index.php/wildfowl/article/download/2591/1710
date added to LUP
2016-12-12 14:08:33
date last changed
2016-12-16 11:31:26
@article{14d58ab8-3c75-4e27-8613-e2b8510e8c58,
  abstract     = {The Whooper Swan Cygnus cygnus was a rare breeding species in Sweden during the early years of the 20th century, when total numbers likely consisted of only 20 pairs. Recent decades have however seen a marked increase in numbers and a spread in the swans’ distribution, with the number of pairs breeding in the two northernmost provinces rising from 310 to 2,700 pairs between two main surveys, in 1972–75 and 1997. This paper documents continued long-term (1967–2014) increases in numbers of Whooper Swans breeding and wintering in Sweden, based on data collected by the Swedish Bird Monitoring Programme and during the mid-winter International Waterbird Counts (IWC). Most recent estimates for the country indicate that there are now 5,400 breeding pairs during the summer and close to 10,000 individuals present in normal or mild winters.<br/>},
  author       = {Nilsson, Leif},
  keyword      = {field feeding,population trends},
  language     = {eng},
  pages        = {197--206},
  publisher    = {Wildfowl and Wetlands Trust},
  series       = {Wildfowl},
  title        = {Long-term trends in numbers of Whooper Swans <em>Cygnus cygnus</em> breeding and wintering in Sweden},
  volume       = {64},
  year         = {2014},
}