Wildfowl Special Issue 7 Proceedings of the 7th International Swan Symposium & 26th Trumpeter Swan Society Conference Jackson, Wyoming, USA 24–27 October 2022

About this book

Wildfowl is an international scientific journal, published annually by Wildfowl Press, and previously published by the Wildfowl & Wetlands Trust (from 1948–2020). It disseminates original material on the ecology, biology and conservation of wildfowl (Anseriformes) and ecologically associated birds (such as waders, rails and flamingos), and on their wetland habitats. Research and review articles related to policy development and application are welcome. Material on habitat management is also sought, particularly where this is directed to the conservation of wildfowl and other wetland birds.

Detailed studies of swans Cygnus sp. have been undertaken since the mid-20th century, with results of research programmes presented periodically at international symposia since the 1st International Swan Symposium was held in the UK in 1971. Wildfowl Special issue 7 contains the proceedings of the 7th International Swan Symposium (7th ISS) of the IUCN SSC Swan Specialist Group, held at Jackson, Wyoming in October 2022. The symposium was
held in conjunction with the 26th Conference of the Trumpeter Swan Society and was hosted and co-organised by the Ricketts Conservation Foundation. Presentations covered a range of topics including population monitoring, movements and flyway delineation, habitat use, demographic rates, climate change, threats and conservation management of the species.

As for the 6th ISS, held in Estonia in 2018, Southern Hemisphere swans were under-represented at the 7th ISS, but greater efforts will be made to cover these species more effectively, along with continued monitoring and assessment of swan populations in the Northern Hemisphere, ahead of the next International Swan Symposium in c. 2–3 years’ time.

Contents

Sponsors   v

Review Papers
- Swan research and conservation: a synthesis of information presented at the 7th International Swan Symposium / E.C. Rees & P. Clausen   1
- Swans and lead fishing weights: a systematic review of deposition, impacts and regulations in Europe / K.A. Wood & J.L. Newth   27
- The North American Trumpeter Swan Survey: retain or find something new? / M.P. Vrtiska, J.A. Dubovsky & M.G. Anderson   57

Standard Papers
- Rocky Mountain Population of Trumpeter Swans Cygnus buccinator (U.S. Breeding Segment): results of the autumn 2022 survey and long-term trends / D. Olson   76
- Retrospective analysis of Trumpeter Swan Cygnus buccinator decline in Yellowstone National Park, USA / E.M. Shields, J.J. Rotella & D.W. Smith   89
- Status and movements of reintroduced Trumpeter Swans Cygnus buccinator, and the status and control measures for non-native Mute Swans Cygnus olor, in Ohio, USA / L.J. Kearns, D.W. Wolfson & D.E. Sherman   115
- Thermal ecology of Trumpeter Swan Cygnus buccinator incubation / P.C. Miller & D.J. Delehanty   131
- Effects of timing and ice melt on spring stopover patterns of migrating Whooper Swans Cygnus cygnus and Bewick’s Swans Cygnus columbianus bewickii in the Russian part of the eastern Gulf of Finland / S.A. Kouzov, A.V. Kravchuk, E.M. Zaynagutdinova & E.V. Abakumov   159
- International census and population trends for Bewick’s Swans Cygnus columbianus bewickii wintering from the East Mediterranean to Central Asia / E.C. Rees, S. Rozenfeld, D. Vangeluwe, P. Ioannidis, K. Erciyas-Yavuz, A. Belousova, E. Rustamov, A. Solokha, E. Sultanov, C. Kowallik, D. Portolou, A. Khrokov, M. Šćiban, V. Ajder, M. Zenatello, K. Koffijberg, G. Kirtaev, N. Rogova, M. Ghasabyan, K.A. Wood, T. Langendoen, S. Nagy, P. Clausen & A.D. Fox   179
- Influence of winter temperature and spring ice melt on the reproductive performance of Mute Swans Cygnus olor nesting on offshore islands at the northern edge of its breeding range / S.A. Kouzov, A.V. Kravchuk, E.V. Abakumov & N.I. Kouzova   202
- Behavioural response of breeding Mute Swans Cygnus olor to lockdown measures: a case study / R. Włodarczyk   222
- Shifts in site use by spring-staging swans Cygnus sp., from traditional to artificially reclaimed habitat in the Gulf of Finland / Y.M. Mikhailov, K.A. Kaskova, O.A. Babkina & E.M. Zaynagutdinova   234
- Variability in the breeding season of Black Swans Cygnus atratus in southeast Queensland, Australia / J.T. Coleman & L.A. Coleman   252

Short Communications
- Distribution, abundance and habitat choice of Whooper Swans Cygnus cygnus breeding in Latvia and Estonia, 1973–2021 / D. Boiko & L. Luigujõe   266

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