Bats in Dutch nature reserve

Bats in old bunkers from Andris Krastiņš on Vimeo.

This video from Latvia says about itself:

On the 14th of February 2009 we searched for bats in winter-sleep inside old bunkers in Mangaļsala, Rīga, Latvija.

The task was to assess the population, classify individuals by species and disturb them as little as possible.

In total 5 people in 2 teams we found 78 bats from 5 species – considered not bad for that place.

Translated from Rogier Lange, Vleermuiswerkgroep AWD in the Netherlands:

The Vleermuiswerkgroep AWD [Bat Working Group] has been counting bats for 25 years in the [World War II German] bunkers of the nature reserve Amsterdamse Waterleidingduinen. And successfully so, because every year they find more bats. With some minor adjustments the bunkers prove to be ideal hibernation places. …

The numbers in the course of the years increased from 76 to over 260, an average increase of over 5% per year!

The most numerous species is the Daubenton’s bat, with a maximum of 221 individuals. In the early years more than 90% of the bats counted belonged to this species, in recent years this is below 80% due to the emergence of other species. Second is the brown long-eared bat (up to 35 individuals, 8 to 15% of the total number), followed by the Natterer’s bat (up to 14 individuals, last year 5% of the total).

The pond bat is emerging. In the early years it was a rarity, last winter 18 specimens of this species exceeded the 5% limit for the first time. Finally, in the early years occasionally a single whiskered bat was observed.

1 thought on “Bats in Dutch nature reserve

  1. 27 January 2012 Last updated at 22:25 GMT Help

    Bats are finding a surprising haven in abandoned Israeli bunkers, researchers say.

    The bunkers, on the border with Jordan, have been turned into official bat caves, helping to save the endangered mammals from extinction.

    Scientists say they have identified 12 indigenous bat species in the 100 kilometre (60 mile)-long tract between the Sea of Galilee in Israel and the Dead Sea’s northern edge in the occupied West Bank.

    “This place of all places, that man built and later left, they (bats) were wise enough to enter and live in,” Aviam Atar, of the Israeli Nature and Parks Authority, said.

    Pia Harold reports. with video there


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