Nathusius Pipistrell migrate accross
Kvarken to Sweden during fall
In recent years,
researchers have assumed that the Nathusius Pipistrell, migrate across Kvarken
from Finland to Sweden during fall. Now they found evidence by radio tracking.
The life of mammals in Finland is generally well documented, but the bats
constitute an exception. The biologists recently solved a riddle since they had
to confirm that the Nathusius Pipistrell migrate accross Kvarken to Sweden
during the fall. Their flight route goes via the Valsörarna to Holmögadd.
The researchers have investigated migrating bats at Valsörarna's
Biological Station for five years. By capturing Nathusius Pipistrell and
attaching a small radio transmitter to them, it has been possible to document
the migration route. Nathusius Pipistrell are no larger than a matchbox and they
only weigh 5–10 grams, but they move 2,000 kilometers to winter in Western
Europe, says Metsähallitus.
More information can be found in the next issue of Fennoscandin Bats and
Trollpipistrell. Foto: Francois Schwaab.
Indre Fosen municipality reported to Police and Norwegian Food Safety Authority
according to law on animal welfare
A message of concern is forwarded to Police and the District
Food Safety Authority)
since the municipality is planning on demolishing buildings at
Rissa. At one of these
buildings there have been recorded emerging bats, and it is unknown if the bats
still occupy the building.
The law on animal welfare (Dyrevelferdsloven) state in
person who believe that animals are exposed to abuse or serious destruction
of environment, supervision and care, shall as urgently as possible alert
Norwegian Food Safety Authority or Police.»
NIFF have contacted a number of persons in the
municipality, but it is case worker Stian Fallrø at the planning department who
make decisions concerning inspection of the buildings involved for demolition.
NIFF sent an application on 26 June to survey the building for bats, and 138
days later (4,5 months) a reply has still not been received. Therefore, the
Parliamentary Ombudsman have been contacted to force the municipality to reply.
Indre Fosen municipality is
already known for the colony of Whiskered Bats (Myotis mystacinus)
located in Hoven old school building. At Hoven a number of laws and regulations
were ignored in connection to the improvement of the road between Vanvikan and
Leksvik. All vegetation around the colony was removed for several hundred
meters, and the landscape changed, all with the blessing of the municipality.
This is the most serious environmental crime committed on bats in Norway during
recent years. This colony is the northern most known maternity roost in Norway,
and maybe in the whole world.
NIFF initiates an audit of the
administration to Mære church and Dalen chapel (Romerike, Norway)
On 6. July NIFF discovered
that a large portion of the trees on the edge of Mære church (Enebakk
municipality) were removed to the north towards the river and west (towards the
golf court. In a conversation with the church administration it was revealed
that the motivation was to make the church more visible in the landscape, making
it more apparent for the golfers. However, this church has hosted a colony of
Brown Long-eared Bats since the mid 1990's, or longer.
Furthermore, another church was also discovered
during 9 October where all the church yard trees had been removed. Dalen chapel
had a large stands of trees belonging to several species, leaving behind an open
area with no taller vegetation. This church also had a colony of Brown
Long-eared Bats for several decades.
A well established fact is that Long-eared Bats
are dependent on vegetation between the church and its foraging sites, since the
bat only flies after dark in the cover of vegetation. These two churches are
located in Enebakk and Fet municipalities, on each side of the lake Øyeren, just
east of Oslo.
Using public access laws and the Aarhus
convention allowing access to environmental information, NIFF is now staring an
audit to reveal what really happened and who is responsible. If any laws were
broken, NIFF will recommend to the local police that the responsible people will
Phenology stations diploid
Today most of the phenology
stations were diploid. These are AnaBat Express detectors which register fall
activity of foraging bats as the season becomes more unfavourable for insect
prey, forcing the bats to hibernate. The detectors are located in Norway and
Sweden. Unfortunately our economy didn't allow us to deploy the Danish stations.
We hope for the future to involve more local bat workers to deploy and service
our detectors. In addition to the phenology stations covering foraging habitats,
a detector has been placed at Romsås in Oslo. This station register
Parti-colored Bats during the start of the display season which lasts from
September till December.
Help line with record high of phone calls concerning
bats in distress
This summer we reached a record high of
phone calls from people who found bats in distress. Most of the calls refer to
juveniles which just learned to fly. We always ask for pictures of the bats,
since they give valuable information on species identification and age.
Double standards concerning management of bats at Sørum visiting ranch (Leira)
Sørum Fritidsgård is a riding school owned
and managed by Skedsmo municipality, located just outside Lillestrøm. Some parts
of the ranch property is preserved as a nature reserve, while other parts are
designated as areas of recreation. The areas are located next to the oxbow lake
Stilla, which is a part of the riverplains of Leira.
The area contains a high species diversity of
bats, including high numbers of foraging Parti-colored Bats, Northern Bats, and
Norway's hot spot for Noctules. This area was also visited this August during
the evening trips to the 3rd European Alpine Bat Detector Workshop.
A number of bat boxes have been hung up in the
forest connected to the Sørum ranch. Sørum Fritidsgård have also posted a board,
informing the importance of the bat boxes since they replace the lack for roost
trees in the area. However, Sørum Fritidsgård just removed a huge birch and a
number of aspen trees just a few meters from the poster, informing that trees
are important to bats. These trees were just reaching an age and dimension
making it possible for birds, bats and other animals to nest in them, being
important for wildlife for at least the next 50-80 years.
NIFF has asked for an explanation from Elin
Heistad (manager for Sørum Fritidsgård) to why the trees have been removed, and
underlined the importance for developing a management plan of the area where
nature should have first priority.
Bat Call Reference Library Collection Trip in Trøndelag
During the 10th
European Bat detector Workshop in Biddarai (the Basque Country) in 2017, there
was established a working group whose aim was to standardize methods for
collecting bat calls in the field. Special focus was on (1) developing
microphone standards, (2) establishing a bat call reference library and (3)
enabling inexpensive high quality detectors and microphones.
In connection to this work, five people joined a
post-workshop expedition to Trøndelag (Central Norway) during 6. to 9. of August.
(USA/Australia), Leif Gjerde and Arnold Andreasson participated as specialists
from the working group, while Laura Alsina (Spain) and Angel Iglesias
(Catalonia) also joined.
Three colonies were
visited on three separate days to collect calls from emerging bats. Also the
surrounding habitats were visited. The species were from known colonies of
Myotis brandtii, Myotis mystacinus and Eptesicus nilssonii,
making species identification safe for the calls collected. Furthermore, no
nearby colonies exist of any confusing species.
The results from the trip will be included in the
Proceedings. More details will also be included in the next number of
Bats. A photo gallery will eventually be available on
European Alpine Bat Detector Workshop organized in
A handful of people from 9 countries
participated during the 3rd European Alpine Bat Detector Workshop which
was organized in Askim (South-Eastern Norway) during 2. - 6.
August 2018. This series of workshops were first organized in Trenta
(Slovenia) during 2012, followed by the second in Vercors (France) in 2015. So
this years workshop was the beginning of a new tradition, with the third of its
The workshop was organized by Leif Gjerde and Arnold Andreasson, both from
NIFF, who were responsible for the program. The aim of the workshop was to
provide field training in practical bat work, especially with the use of various
models of both passive and active bat detectors.
The results from
the workshop will be included in the Proceedings. More details will also be
included in the next number of
Fennoscandian Bats. A photo
gallery will eventually be available on
Leira river plains surveyed for bats
The riverplains to the river Leira were
surveyed during 24. May to 3 June. A total of 8 transects and 25.6 km were
surveyed by foot. The same area was last surveyed 25 years ago. However, the
Leira area is frequently visited during various excursions or specific projects
every year, but this is the first time since 1993 that the entire area has been
surveyed systematically. Most of the work was carried out this summer, but two
transects still remain. So the work will be finished off next summer, when we
hope to add some new transects in the north and east of the area.
The Romsås-project presented at the Edinburgh-conference
The Second Social Calls of Bats Conference was organized
during 26. and 27. April in Edinburgh, Scotland. Leif Gjerde from NIFF was
invited, presenting the talk «Applying bird census techniques
to survey bat
territories of Vespertilio murinus».
The talk presented experiences from
the Parti-colored Bat at Romsås, using techniques used by ornithologists since
the mid 1900's.