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Om Zoorum Generelt Tragus

Velkommen til Tragus!

Dette er en videreføring av den tidligere e-postlisten Tragus for folk som er interessert i flaggermus.

Har du noe å melde om flaggermus som kan være interessant for andre, så skriv det inn her - så vil andre også få glede av det. Det vil om noen uker bli mulig å velge å få nye poster tilsendt på e-post, men foreløpig er dette bare et forum hvor du må kikke innom for å se om det er noe nytt.

Alle kan skrive nytt, alle kan kommentere.

The Social Calls of Bats within the UK – Contributions Sought

Av Magne Flåten. Friday 10 August 2012
 Neil Middleton, Andrew Froud & Keith French are working on finalising 
a new book “The Social Calls of Bats Within The UK”, and they would 
like to invite anyone with any appropriate material they may wish to 
contribute, to do so by contacting Neil Middleton by email at 
neil.middleton@echoesecology.co.uk or phone (Tel: 0870 234 0002). All 
contributions used in the final version of the publication will be 
fully and properly acknowledged. The authors are keen to ensure that 
any such contributions are from known species, or species group, and 
in particular they are keen to acquire some additional material 
relative to the less common or less widely distributed species. They 
are happy to consider Time Expanded, Full Spectrum, Frequency Division 
or AnaBat recordings.

The Social Calls of Bats Within The UK
By Neil Middleton, Andrew Froud & Keith French
Paperback Book & Accompanying CD (Anticipated Retail Price – c.£30.00)
 Due to be published – Summer 2013

Social calls relating to bats is an area that little is known about, 
with much research still required in order to further our 
understanding.  None the less, bat social calls are fascinating to 
listen to, complex and species specific. This book and CD summarises 
what is understood so far about social calls relating to a number of 
the bat species occurring within the UK, with some additional examples 
from mainland Europe. The authors and contributors have collected 
calls from throughout the UK and Europe, and it is anticipated that 
the material provided will be of benefit to people carrying out bat 
studies, and also enthuse others to carry out further research.

 To register your interest in purchasing a copy of the publication 
once it becomes available, please send an email to 
, and you will be kept up-to-date with developments and given advance 
notice of the specific publishing date.
Naturformidling van der Kooij
Rudsteinveien 67
NO-1480 Slattum

Tlf: +47 67 07 17 29 / +47 911 50 365
E-post: jevader@online.no

German Wind Farms Can Kill Bats from Near and Far, Research Suggests

Av Magne Flåten. Sunday 8 July 2012
ScienceDaily (July 2, 2012) - Wind turbines may have large-scale negative
effects on distant ecosystems. Results of research by the Leibniz Institute
for Zoo and Wildlife Research (IZW) demonstrate that bats killed at German
wind turbines originate mostly from northeastern Europe.
The study investigated the provenance of those four bat species which are
most frequently killed by German wind turbines. Bats are of particular
interest because they have a vital and important service function for
ecosystems in regulating population densities of pest insects, and because
many species migrate during spring and autumn across Europe between their
breeding and wintering ranges.
The IZW-researchers analysed the hydrogen stable isotope ratio in the fur
keratin of the bats. Hydrogen has two stable isotopes that share similar
chemical properties but differ in mass. The distribution of these isotopes
varies in a systematic pattern across Europe, with the light isotopes
increasing in atmospheric water from south to north.  
Since bats incorporate the hydrogen stable isotope ratios of their breeding
habitat into their fur, they carry an inert isotopic fingerprint on their
way to their wintering grounds. Therefore, by determining this isotopic
fingerprint, researchers can identify the approximate location where the
animals lived during the breeding season for a few months before they died
at a wind farm.
The study demonstrated that killed Nathusius pipistrelles originated almost
exclusively from the Baltic countries, Belarus and Russia.  
Also, greater noctule bats and Leisler's bats killed by German wind turbines
came from northeastern Europe, probably from Scandinavia, Poland and the
Baltic countries. In contrast, common pipistrelles most probably lived in
nearby local areas around the wind turbines.
Previous studies have already highlighted that more than 200,000 bats are
killed each year by German wind turbines. Researchers are convinced that
such high mortality rates may not be sustainable and lead to drastic
population declines in their breeding ranges. "Bats have a very low
reproductive output, with only one or two offspring per year," says
Christian Voigt from the IZW. Bat populations may need a long time to
recover from any additional losses owing to fatalities at wind turbines if
they recover at all.
Voigt calls for stronger legislative agreements between the E.U. and eastern
European countries. Current international legislation seems to be missing
the large geographical scale of this problem. Germany must play a more
decisive role in this process, given the recent governmental decision to
promote alternative sources of renewable energy, says Voigt. The large-scale
development of wind farms throughout Germany may have negative consequences
for even remote ecosystems in northeastern Europe. Overall, conservationists
and scientists record an increasing number of bat fatalities at wind
turbines. This is partly due to the fact that wind farms are being
increasingly established in forested areas – where people are less annoyed
by their presence but where bats foraging above the tree canopy get into
dangerously close contact with the blades of turbines.  
Recently, researchers discovered that most bats are not killed by directly
hitting the blades of wind turbines but rather by "barrotraumas" – the
inner organs and lungs of bats are lethally damaged when bats are exposed to
rapid pressure reductions behind the blades.
The problem of bat fatalities at wind turbines could be easily solved, says
Voigt. Bat activity is highest at dusk, most importantly during the time of
autumn migration. If the turbines were switched off during this period for
one to two hours, then this would drastically lower the frequency of bat
fatalities, as recent studies suggest, and cause little loss of revenue to
the companies that run the wind turbines.  
Voigt argues "We need an intelligent change in our energy policy, where we
minimise the negative consequences for both people and wildlife."

Naturformidling van der Kooij
Rudsteinveien 67
NO-1480 Slattum

Tlf: +47 67 07 17 29 / +47 911 50 365
E-post: jevader@online.no

Hvorfor blir flaggermus så gamle?

Av Magne Flåten. Friday 18 October 2013

Det drøftes med bakgrunn i forskning på skogflaggermus i en interessant artikkel i web-tidsskriftet nature communications:

Genome analysis reveals insights into physiology and longevity of the Brandt’s bat Myotis brandtii

Artikkelen ar på engelsk, forfatterne er Inge Seim og Xiaodong Fang.

Artikkelen er også omtalt på norsk på forskning.no men originalartikkelen har flere opplysninger og interessante figurer og mer data.

IBats - standardisert artsbestemmelse av flaggermuslyder

Av Magne Flåten. Wednesday 15 August 2012
Spennende å høre om noen har prøvd ut verktøyet!

Holy Bat Detector! Ecologists Develop First Europe-Wide Bat ID Tool

ScienceDaily (Aug. 3, 2012) — Just as differences in song can be used to
distinguish one bird species from another, the pips and squeaks bats use to
find prey can be used to identify different species of bat. Now, for the
first time, ecologists have developed a Europe-wide tool capable of
identifying bats from their echolocation calls. The new free online tool –
iBatsID – will be a major boost to conserving bats, whose numbers have
declined significantly across Europe over the past 50 years. Details are
published August 7 in the British Ecological Society's Journal of Applied
Working with an international team of ecologists, lead author and PhD
student Charlotte Walters from the Zoological Society of London (ZSL)
selected 1,350 calls of 34 different European bat species from EchoBank, a
global echolocation library of more than 200,000 bat calls. The calls were
then analysed to find out which characteristics were most useful in
distinguishing different bat species. According to
Walters: "Lots of different measurements can be taken from an echolocation
call, such as its maximum and minimum frequency, how quickly the frequency
changes during the call, and how long the call lasts, but we didn't know
which of these measurements are most useful for telling different species'
calls apart."
The 12 most useful call parameters were then used to train artificial neural
networks to produce the new identification tool, iBatsID, which can identify
34 different bat species across the whole of Europe. Most species can be
identified correctly more than 80% of the time, although accuracy varies
because some species are much harder to identify than others. "iBatsID can
identify 83-98% of calls from pipistrelle species correctly, but some
species such as those in the Myotis genus are really hard to tell apart and
even with iBatsID we can still only identify 49-81% of Myotis calls
correctly," she explains. iBatsID should have a major impact on European bat
conservation, which until now has been hampered by the absence of a
standardised, objective and continent-scale identification tool.
According to Professor Kate Jones, another of the paper's authors and chair
of the Bat Conservation Trust: "Acoustic methods are really useful for
surveying and monitoring bats, but without using the same identification
methods everywhere, we can't form reliable conclusions about how bat
populations are doing and whether their distributions are changing. Because
many bats migrate between different European countries, we need to monitor
bats at a European, as well as at country, scale. In iBatsID, we now have a
free, online tool that works anywhere in Europe." Bat populations have
declined significantly across Europe since the middle of the 20th century.
As a result, all bats are now protected through the EU Habitats Directive.
Bats face many pressures, including loss of roosting sites in trees and
buildings; loss of feeding habitats in woodlands, meadows, parks and
gardens; falling insect numbers; and habitat fragmentation resulting in the
loss of green corridors such as hedges that provide connectivity in the
As well as providing vital ecosystem services, such as pollinating plants
and controlling insect pests, bats are important indicators of biodiversity.
"Bats are very sensitive to changes in their environment, so if bat
populations are declining, we know that something bad is going on in their
environment. Monitoring bats can therefore give us a good idea of what is
going on with biodiversity in general,"


Naturformidling van der Kooij
Rudsteinveien 67
NO-1480 Slattum

Tlf: +47 67 07 17 29 / +47 911 50 365
E-post: jevader@online.no


Av Magne Flåten. Monday 29 April 2013

Hei, nå er referatet fra Internasjonal flaggermusnatt i flaggermusåret 2011 også lagt ut, som PDF>>.

Dermed har vi referater fra alle år fra 2001 til 2012.

Internasjonal flaggermusnatt i år blir rundt helga 24. - 26. august, men med mulighet for tilpasning til lokale forhold.

Internasjonal flaggermusnatt

Av Magne Flåten. Sunday 14 April 2013

jeg har sitti inne i snøværet og heller jobba litt med zoologi.no og mest med flaggermussidene.

Mest jobb med å lage ny side //zoologi.no/flaggermus/fmnatt/ med referater som PDF fra tidligere års arrangementer,
stemmer det at vi ikke har noe referat fra 2011?

Ellers er det litt nytt småplukk rundt om.
Vi får bare melde inn når vi vet noe, så legger jeg eller andre det gjerne ut i kalenderen.
Jeg ser at //www.eurobats.org/international_bat_night har satt endel arrangementer allerde, jeg melder gjerne allerede nå at at jeg kommer til å ha arrangement på Teie den 24.8 - samme oppskrift som sist.

Nydelig flaggermus oppdaget og beskrevet i South-Sudan!

Av Magne Flåten. Thursday 11 April 2013

Nydelig flaggermus oppdaget og beskrevet i South-Sudan!



Lage tilholdssteder for flaggermus

Av Magne Flåten. Friday 14 September 2012
Jeg kom over denne siden


her er det mye nyttig - også for norske forhold.


Naturformidling van der Kooij
Rudsteinveien 67
NO-1480 Slattum

Tlf: +47 67 07 17 29 / +47 911 50 365
E-post: jevader@online.no

International Symposium on the Importance of Bats as Bioindicators

Av Magne Flåten. Friday 17 August 2012

Dear colleagues,

We are pleased to announce you the forthcoming which will take place on December 5th-7th of 2012 in Granollers (Barcelona), Spain.

The event is intended to compile and integrate current developments on bats as bioindicators of environmental change, to contrast experiences on bat monitoring worldwide and to open up new ideas for developing more successful bat monitoring schemes. With this goal in mind, this symposium will bring together international experts on climate change, bioindication and biomonitoring.

The Symposium will encourage contributors to participate in the production of a joint publication that will summarize the state of the art regarding bats and bioindication and discuss the pros, cons and future perspectives of current and projected bat monitoring programmes. All oral contributions are plenary talks and further contributions in poster format are welcome. Round tables for further discussion of the subjects, were all participants will be welcome to contribute, will be held at the end of each session. Please, find more information at the website of the event: //es.amiando.com/bats_as_bioindicators_symposium_2012.html

We are looking forward to welcoming you to the symposium,

Carles Flaquer & Xavier Puig-Montserrat
Organization Commitee
International Symposium on the Importance of Bats as Bioindicators
Granollers (Barcelona) December 5-7th 2012
Symposium website

Kjell Isaksen
Vossegata 16 B
0475 Oslo
Tlf.: 917 65 637


Av Magne Flåten. Friday 17 August 2012

Jeg videresender denne morsomme (eller tragiske?) historien til andre flaggermusinteresserte. Om dere selv ser predasjon eller forsøk på predasjon på flaggermus, så håper jeg at det blir notert – så kan vi kanskje forsøke å sammenstille slike registreringer en gang? Dette gjelder selv om man ikke sikkert kan identifisere flaggermusa til art. Jeg har for øvrig akkurat lest korrektur på følgende artikkel som blir trykket i løpet av høsten:

Frafjord, K. 2012. Observations of a merlin (Falco columbarius) hunting northern bats (Eptesicus nilssonii) in midnight sun (Northern Norway). Nyctalus (N.F.), Berlin 17 (1): 107-111.

Karl Frafjord

Lars og Grete Ruud [mailto:larsruud@live.no]
Sendt: 3. august 2012 11:52
Til: Frafjord Karl
Emne: Flaggermus-Lerkefalk

God dag!

Jeg leser i “Ottar”nr 3-2012 din interessante artikkel “På flaggermusvinger”. På side 44 står det:”Det er ikke ofte rovfugler er sett fange flaggermus i Norge”,og jeg fikk lyst til å dele en opplevelse jeg hadde kl.21.45 den 27.7.1993.Flaggermus har jeg lite kunnskap om,men jeg kan mye om fugler. Etter en lengre økt i hagen sitter jeg på min veranda på Grorud i Oslo og titter på to flaggermus som jakter rutinemessig rundt trærne i hagen.(Dagen tilbringer de under pipebeslaget har jeg tidligere funnet ut.)Jeg prøver å se om det er et slags system i åttetallene deres, da en fugl med spisse sigdformede vinger farer forbi i stor fart mellom meg og flaggermusene.”Tårnseiler” er min første innskytelse,så: ”Nei,for mørkt og sent”. Etter ca 2 sekunder grubling på alternativer har fuglen snudd og bare få meter foran meg foretar den en så brå kursendring at det piper i svingfjærene-et lavt,men tydelig smell-og det er bare en flaggermus å se. Det var det resten av sommeren og høsten også.

Hendelsen ble rapportert til N.O.F. avdeling Oslo og Akershus som fant det godtgjort at det var en Falco subbuteo-Lerkefalk-som fikk seg varm kveldsmat.

Det er tidligere konstatert hekking av Lerkefalk i Øyerenområdet (Haftorn),som befinner seg noen minutters flytur unna Grorud for en slik fugl.Den er sjelden å se på Østlandet.

I dag bor vi på Tjøme, og har også her et par flaggermus rundt hus og hage. Hver gang jeg titter på dem tenker jeg på hvor fantastisk heldig jeg var den kvelden for 19 år siden!

(I parentes bemerket: En kamerat av meg var vel den eneste som fikk med seg at en Vandrefalk tok en bydue over 17.mai toget i Oslo sentrum! Falken hadde tilhold i en vindusnisje nær toppen av Hotell Plaza.)

Med vennlig hilsen.

Lars Ruud
Flekkenveien 21
3145 TJØME

"Lydbok" er å anbefale

Av Magne Flåten. Monday 9 July 2012
Har nå kjøpt meg denne. Den er absolutt å anbefale for de som driver med
lydanalyse. Nordflaggermus og skimmelflaggermus mangler dessverre.  
Den første er jo en grei art og ikke avgjørende, men skimmelflaggermus hadde
vært fint å få med.


Naturformidling van der Kooij
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NO-1480 Slattum

Tlf: +47 67 07 17 29 / +47 911 50 365
E-post: jevader@online.no
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