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Sunday, September 30th, 2018
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Birds
International Bearded Vulture Watch Days
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Thursday, September 13th, 2018
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posted by Sylvain Antoniazza
 
Friday, August 17th, 2018
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Sorry for the interruption!
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Record marmot sightings for the new mammal atlas
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Communication of the Swiss Rarities Committee
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Friday, May 25th, 2018
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Watch out for Rosy Starlings!
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Friday, April 20th, 2018
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Butterflies
A hard winter for the Red Admiral

Last winter was a hard one for Red Admirals. In contrast to species such as the Brimstone, Red Admirals do not enter “proper” dormancy in winter. They remain inactive during periods of cold weather, but become active on any suitable day and need to refuel. However, days with suitable conditions for flight were rare in Switzerland during the winter 2017/2018, which was characterised by above-average precipitation and below-average sunshine duration. The notion of a hard winter from a Red Admiral’s perspective is further corroborated by butterfly observations recorded on www.ornitho.ch. During the first mild and sunny days in March Red Admirals were recorded in much lower numbers compared to Brimstones, than after last year’s sunny and dry winter.
How will 2018 continue for the Red Admiral? Help us find out! Please report your observations to www.ornitho.ch and thus support the Red Admiral Citizen Science project initiated by the University of Bern.
Thank you very much!

Insect Migration & Ecology Research Group, Institute of Ecology and Evolution, University of Bern   More

Important note: With its red banded and white spotted black wings, the Red Admiral can be easily distinguished from other butterflies. However, caution is needed when identifying flying individuals. Possible confusion species are Small Tortoiseshell and Painted Lady. Both species are also known to be migratory. For instance, migrating Small tortoiseshells are currently being observed in the Alps.
A useful identification guide can be found here.

posted by Hans Schmid
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