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The site was identified as internationally important for bird conservation in 2000 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.

Populations meeting IBA criteria ('key species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Goosander Mergus merganser	LC	resident (1996)	40–50 breeding pairs	B1i
Great Crested Grebe Podiceps cristatus	LC	winter (1998)	1,200–3,700 individuals	A4i, B1i

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2000. The most recent assessment (2010) is shown below.

Pressure (threats to the key species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	happen­ing now	few individ­uals/small area (<10%)	no deteri­oration (<1% over 3 gener­ations)	low
Residential and commercial development	likely in long term (beyond 4 years)	whole popul­ation/area (>90%)	no deteri­oration (<1% over 3 gener­ations)	low
Human intrusions and disturbance	likely in long term (beyond 4 years)	whole popul­ation/area (>90%)	no deteri­oration (<1% over 3 gener­ations)	low

Response (conservation actions taken for the key species and/or their habitats)
Designation	Planning	Action	Result
Some of site covered (10–49%)	Unknown	Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity	low

Year	Protected Area	Designation (management category)	% coverage of IBA
2001	Pointe de Promenthoux (VD)	Bundesinventar der Wasser- und Zugvogelreservate von internationaler und nationaler Bedeutung (IV)	56
2010	Villas Prangins	Bundesinventar der Trockenwiesen und -weiden von nationaler Bedeutung (IV)	<1

Habitat	% of IBA	Habitat detail
Wetlands (inland)	76	Standing freshwater
Artificial/Terrestrial	9	Urban parks and gardens; Other urban and industrial areas
Grassland	8	Humid grasslands; Mesophile grasslands
Forest	5	Broadleaved deciduous woodland; Alluvial and very wet forest

Land use	% of IBA
agriculture	9
urban/industrial/transport	9
forestry	minor (<10)
fisheries/aquaculture	-
hunting	-
tourism/recreation	-

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Lake Geneva: Rolle to Céligny (Switzerland). Downloaded from https://datazone.birdlife.org/site/factsheet/lake-geneva:-rolle-to-céligny-iba-switzerland on 09/01/2025.