The reserve's officers regularly see wild boar, deer, fox, coypu, squirrel, marten, polecat, weasel and micro-mammals.

Bats (Chiroptera) traditionally use alluvial forests as hunting sites. They were catalogued in 2009 and, since 2011, have been subject to specific monitoring.

http://rn-rohrschollen.strasbourg.eu/uploads/images/pipistrelle_pygmee-M-SOL.jpg http://rn-rohrschollen.strasbourg.eu/uploads/images/murin_a_moustaches_2-M-SOL.jpg http://rn-rohrschollen.strasbourg.eu/uploads/images/murin_a_ moustaches_1-M-SOL.jpg

Initial Chiroptera inventory

The Chiroptera inventory compiled by the GEPMA in 2008-2009 helped to identify ten species of Chiroptera in the reserve, including two for which presence on the site remains to be confirmed by monitoring set up in 2011: Pond Bat (Myotis dasycneme) and Serotine Bat (Eptesicus serotinus).

In France, all species of Chiroptera are protected by law.

Some of the species catalogued in the reserve have an unfavourable conservation status in France, appear in the Red List or Orange List of fauna threatened in Alsace, or even appear in Annexes II and/or IV of the Habitats Directive.

The species identified in 2008-2009 and their vulnerability and statutory status (excluding national statutory status) are presented in the following table:

Common name

Scientific name

Habitats Directive

Conservation status in France

Regional conservation status

Whiskered Bat

Myotis mystacinus

Annex IV

Minor concern

Heritage

Daubenton's Bat

Myotis daubentonii

Annex IV

Minor concern

Heritage

Pond Bat

Myotis dasycneme

Annexes II & IV

Off list

 

Common Noctule

Nyctalus noctula

Annex IV

Quasi threatened

To be monitored

Lesser Noctule

Nyctalus leisleri

Annex IV

Quasi threatened

To be monitored

Grey Long-eared Bat

Plecotus austriacus

Annex IV

Minor concern

To be monitored

Common Pipistrelle

Pipistrellus pipistrellus

Annex IV

Minor concern

To be monitored

Nathusius' Pipistrelle

Pipistrellus nathusii

Annex IV

Quasi threatened

To be monitored

Soprano Pipistrelle

Pipistrellus pygmaeus

Annex IV

Minor concern

Potential

Serotine Bat

Eptesicus serotinus

Annex IV

Minor concern

Rare

 

 

Orange List Alsace

 

Red List Alsace

The Pond Bat (Myotis dasycneme) is the species for which there is most at stake in terms of conservation on the site. Even though it is indeed present, it is considered rare in France.

Monitoring the reserve's Chiroptera population

Several monitoring priorities have been developed on the reserve since 2011 in order:

  • To ensure tracking of the island's Chiroptera population
  • To establish the status of two species (Pond Bat & Serotine bat)
  • To complete the initial list of species with any appearance of new species that may be potentially observed along the Rhine Valley.

In the field, the monitoring measures consist in:

  • Daytime checking of a series of 30 Chiroptera hides at five sites on the edge of the reserve's forest massif and all bunkers on the island
  • Carrying out nocturnal missions to monitor the Chiroptera's ultrasound emissions using an ultrasound detector and a digital recorder in order to be able to record and then, if in doubt, use the Bat Sound software to check the identification of the species to which the emissions correspond, which are difficult to identify in the field.

These listening missions are carried out at a series of nine posts over 10 to 20 minutes.

Photographs © Michael SOL : Soprano Pipistrelle - Whiskered Bat (2)