KAISERAUGST Nadine Böni 28.01.2021, 05.00 hrs
Exemption granted – drone to get crows’ nests from trees
The municipality of Kaiseraugst has been fighting the crow problem in the Liebrüti housing estate for years. Now the canton has granted an exemption: The birds’ nests may be removed even during the closed season.
The Kaiseraugst municipal office still receives weekly e-mails and letters on the subject of crows in the Liebrüti housing estate. The birds have been causing great annoyance among residents there for years. Their cawing wakes some people up early in the morning and disturbs them in the evening and into the night.
For some time now, the municipality has therefore been pursuing the so-called three-pillar concept – food deprivation, deterrence and decimation. “We have taken measures in all areas of the concept. This has had an effect, but unfortunately only in the relatively short term,” says local councillor Jean Frey. The birds always returned – and with them the complaints. “Understandably so,” says Frey.
The crows should look for other nesting sites
Now the municipality wants to go one step further. It has received an exceptional permit from the canton to remove the crows’ nests, beyond the grace period for crows that actually begins on 16 February. “No more nests may be removed until egg-laying has taken place,” says Erwin Osterwalder, specialist in hunting and fishing at the canton.
“This is a deterrence measure with the aim of shifting the breeding of the crows to the forest areas outside the settlement,” says Frey. There are suitable trees along the Violenbach and towards the motorway, and the potential for disturbance is much smaller there. Such or similar exceptional permits are rarely granted. “We are very restrictive about granting permits for nest removal and only grant them if other measures have been carried out first, as Kaiseraugst did,” says Osterwalder. “We also always consult with Birdlife Aargau before issuing a permit.”
However, the rook population has established itself in Kaiseraugst within a short time and has grown rapidly. Osterwalder has already seen the situation for himself on site. He justifies the exceptional permit:
“The crows breed in the middle of the housing estate. The associated noise pollution and the droppings over the whole area exceed the tolerable level.
There are no empirical values for this measure. But Osterwalder is confident that it could have an effect in the long term. “It is not lethal, but it is a very strong intervention in the breeding behaviour of the birds,” he says. The canton will remain in contact with the municipality to monitor how the situation develops.
A drone with a gripper arm is to take hold
A specially developed drone with a gripper arm will be used to remove the nests. It comes from the company Eagle Eye Multicopter Services GmbH. The company has already been active in the past two years in combating crows in Liebrüti – with the robotic falcon “Robird”.
Last week, a test flight was carried out with the drone. “It worked,” says Jean Frey.
In February, when the crows start building their nests, the drone will be used. The trees will then be checked weekly and the nests removed on an ongoing basis, says Frey.
“The aim is to prevent large-scale egg-laying in the first place, but to ensure that the birds move to other locations for this purpose.”
The corresponding contract with the company is currently being drawn up. A few tens of thousands of francs have been reserved in the municipality’s 2021 budget for crow control.
Waste disposal company installs nets over the rubbish
Another measure is to make it even more difficult for the crows to get food. In the evenings and at weekends, the crows’ access to the waste disposal company in the Rinau area will be closed with nets and the containers will be covered. The corresponding building permit from the municipality has been obtained. “We hope that we will now find ways to solve the problem in the long term,” says Jean Frey.
from 06. August 2019 (Bähram Alagheband)
Remote-controlled robot falcon scares off ravens and crows
Aktuell vom 06. August 2019 (Anna Bisig)
Drone hawk against crow plague
The residents of the Liebrüti neighbourhood in Kaiseraugst are currently struggling with a plague of crows. Now the municipality wants to scare the birds away with the so-called “Robird”. Tele M1 asks whether the flying scarecrow works.
Years of crow plague: Aargau municipality fights birds with robot
News vom 6.August 2019 ( Anna Bisig, Tele M1)
Bird plague: Drone to drive away crows
For months, the municipality of Kaiseraugst has been struggling with a crow problem. Now a drone that looks like a hawk is to provide relief.
With a false falcon against crows from Kaiseraugst (17.April 2019)
Video zum Artikel – Zürichsee Zeitung 13.3.18:
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Video on 20minuten online:klick here