2nd International Swan Symposium 1980: Sapporo, Hokkaido, Japan

Ten years of swan counts in Japan by M Horiuchi

Present status of the swans wintering in Korea by Pyong-Oh Won

Numbers of swans wintering in the United States by J C Bartonek, W W Blandin, K E Gamble and H W Miller

A correlation between Cygnus columbianus columbianus territories and water bodies in western Alaska by J G King and J I Hodges

The status and future of the Alaska population of Cygnus Cygnus Buccinators by J G King

Status of Cygnus olor in the eastern United States by G Fenwick

The numerical distribution and conservation requirements of swans in northwest Europe by G L Atkinson-Willes

Cygnus columbianus bewickii in the border lakes of the Ijsselmeer polders by E P R Poorter

On the migration routes of swans in Hokkaido, Japan by S Matsui, N Yamanouchi and T Suzuki

The cold air current in the Khabarovsk area, and the correlation with swan numbers at Lake Hyoko, Japan by A Nakanishi

The wild swans at Lake Inawashiro, Japan: some aspects of their Migration by T Ohmori

Neck-banding of swans in Japan by IVI Yoshii

Traditional return of Cygnus columbianus columbianus to wintering areas in Maryland’s Chesapeake Bay by R E Munro

The long term study of Cygnus columbianus bewickii at Slimbridge by M E Evans

The recording and retrieval of bill pattern variations in Cygnus columbianus bewickii by E C Rees

Migration of Cygnus olor ringed in Denmark in winter and during  Moult by P Andersen-Harild

The moulting ground’s relation to breeding and wintering areas as revealed by neck-banded Cygnus olor by S Mathiasson

Preliminary results of neck-collared Cygnus Cygnus Cygnus by N O Preuss

The life span of swans by K Honda

The demography of New Zealand’s Cygnus atratus population by M Williams

Population structure and productivity of Cygnus columbianus columbianus on the Yukon Delta, Alaska by C P Dau

Breeding ecology of Cygnus Cygnus buccinator in Wyoming by R E Shea

Breeding of Cygnus cygnus cygnus in a coastal area of southern  Norway by S Myrberget

Population dynamics of Cygnus olor in Denmark by P Andersen-Harild

An isolated population of Cygnus olor in Scotland by C Spray

Hierarchy in the family group and social behaviour in wintering Cygnus cygnus cygnus by R Kakizawa

Social behaviour of wintering Cygnus columbianus bewickii by D K Scott

Seasonal variation, sex differences and habituation  of territorial behaviour in Cygnus olor by J Demarest

Artificial feeding of swans in Japan by T Ohmori

The feeding of swans and its results by M Hatakeyama

Winter habitat and food of Cygnus cygnus buccinator in British Columbia, Canada by R W McKelvey

Field feeding by Cygnus columbianus columbianus in Maryland by R E Munro

Summer behaviour of Cygnus cygnus cygnus in Iceland by M Brazil

The behavioural ecology of Cygnus cygnus cygnus in central Scotland by M Brazil

Food selection by Cygnus olor in Chesapeake Bay, Maryland by G H Fenwick

Management of swans in the United States by J C Bartonek, W W Blandin, K E Gamble, H W Miller and J P Rogers

Hunting and management of Cygnus atratus in New Zealand by M Williams

Post-mortem examination of Cygnus cygnus cygnus in Japan by K Hattori

Mortality factors of wild swans in British Columbia, Canada by R W McKelvey and A C MacNeill

Disease problems in North American swans by M Friend, P D Hagen, D J Voros and M E McDonald

Heartworm Sarconema eurycerca, a circumpolar infection in swans by W J Seegar

The wild swans at Lake Tofutsu-ko, Hokkaido, Japan by M Tamada

The Trumpeter Swan Society by D K Weaver

Cygnus cygnus buccinator in Skagit Valley, Washington State, USA by M Jordan and R Canniff

Non-professional contributions to swan research by F L Parks, J Evans and E Hake

The swan supporter scheme at Slimbridge and a proposal for an audio-visual programme on swans by M E Evans

Around the year with a Danish swan amateur by E Hansen

The use of Electronic Data Processing (EDP) in Danish swan recording 343 by E Hansen

Anatomical sketch of young wild swans by T Ohmori

Genetic comparison of Cygnus cygnus buccinator populations by E R Vyse and V A Barrett

Weights of Cygnus columbianus columbianus as an indicator of changing resources by W J L Sladen, G H Fenwick and N Primrose

Weight changes in Cygnus olor by P Andersen-Harild

Weight and growth rates of morphological characters of Cygnus olor by S Mathiasson

Population genetics of Cygnus olor by P J Bacon