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Friday, April 20th, 2018
avinews
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
 
Monday, April 2nd, 2018
avinews
Birds
Disturbance during the breeding period and pictures taken at nests
posted by Hans Schmid
 
Saturday, March 31st, 2018
technews
Birds
NaturaList: using offline maps
posted by Hans Schmid
 
Monday, March 26th, 2018
technews
Birds
Bird migration live on radar
posted by Hans Schmid
 
Sunday, March 18th, 2018
avinews
Birds
Communication of the Swiss Rarities Committee
posted by Bernard Volet
 
Friday, March 16th, 2018
technews
New: mortality tool
posted by Hans Schmid
 
Wednesday, March 14th, 2018
avinews
Birds
Monitoring the breeding populatio of Rooks
posted by Hans Schmid
 
Wednesday, January 3rd, 2018
avinews
Birds
Winter Mountain Bird Race 2018 (L'Oiseau-Course d'Hiver d'Altitude = OCHA)
posted by Hans Schmid
 
Saturday, December 30th, 2017
avinews
Birds
We wish you a Happy New Year!
posted by Hans Schmid
 
Friday, December 29th, 2017
avinews
Birds
Second “Wintering White Stork Census”
posted by Hans Schmid
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