The first ABOL BioBlitz 2021 took place on June 11th and 12th, at the Danube Island (Donauinsel) during the 20th Vienna Day of Biodiversity organized by the departments of the municipality of Vienna for environmental protection and water. Numerous biodiversity experts swarmed out to record the fauna, flora and funga of the Donauinsel, especially in the area of ​​Wehr 1 and Tritonwasser, whereby samples were also collected for the creation of DNA barcodes.

Experts met on Friday evening to attract moths and other nocturnal insects with numerous light traps. On Saturday, when the weather was mostly fine, the well-developed, species-rich meadows around the basecamp were investigated. Not only the honey bee was strongly represented on the numerous flowering Knautia individuals but also the solitary bee Andrena hattorfiana, which is an oligolectic species feeding on Knautia pollen and a few other Dipsacaceae. Even the parasite of A. hattorfiana, Nomada armata, could be detected. Numerous other insect species were found in the meadows. The nearby Triton water with beautiful silting zones in which water frogs could be found in large numbers was particularly interesting for the amphibia experts. It is particularly gratifying that – although the data reporting has not yet been completed – with Trigoniophthalmus alternatus, a representative of the large group of bristletails, a new record for Vienna has already been booked.
Unfortunately, due to the corona pandemic, no public event could take place this year, but it should be rescheduled at the same place next year.
We would like to thank the organizers and the participants of the ABOL BioBlitz!

Impressions from the study area (Photos: N. Szucsich, C. Leeb, M. Sonnleitner):