Bird migration and the moon, new research


This video from England is called Excerpts from a month in front of a European Nightjar nest in the Forest of Dean in 2018.

From Lund University in Sweden:

The moon determines when migratory birds head south

October 16, 2019

A new study from Lund University in Sweden shows that the presence or absence of moonlight has a considerable bearing on when migratory birds take flight in the autumn.

Together with colleagues at the Department of Biology at Lund University, Gabriel Norevik studied European nightjars (Caprimulgus europaeus) and how the lunar cycle and moonlight affects the departure time when the birds start their three-month-long migration flight to areas south of the Sahara.

Using miniature data loggers, the researchers charted the activity of 39 European nightjars over a one-year period. The results show that the birds are more than twice as active in their hunt for insects during moonlit nights compared with when it is dark. The study also shows that the birds begin their autumn migration south about ten days after the full moon, and that the individuals synchronise the migration and fly off more or less at the same time.

“It surprised us that the lunar cycle and the time the birds spent on hunting insects co-vary so well. This in turn affects their migration pattern in such a way that they synchronise their flight so that practically all of them fly off at the same time ten days after the full moon,” says Gabriel Norevik.

European nightjars use their sight when they hunt at night. In the moonlight they find it easier to catch flying insects and replenish their energy reserves.

The birds migratefly in three stages from Sweden and northern Europe to wintering sites south of the Sahara. Each stage follows the same pattern: when the moon provides a lot of light it more than doubles the time that the birds hunt insects, and the next stage of the migration starts ten days after the full moon.

The study of European nightjars is the first of its type to describe how a large-scale pattern such as the lunar cycle can synchronise large groups of animals to migrate at the same time. The researchers do not exclude the notion that animals other than European nightjars also adapt to the lunar cycle when they migrate.

“We will go on to examine that and what effects this type of synchronised migration has on the birds themselves and their surroundings,” says Gabriel Norevik.

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Kurdish Dutch, Swedes against Erdogan invading Syria


This 12 October 2019 video is about Kurdish Swedish people demonstrating in Gothenburg, Sweden against the Turkish Erdogan regime invading Syria.

This 12 October 2019 video is about Kurdish Dutch demonstrating in The Hague against Erdogan invading Syria.

20,000 on London’s streets say ‘Stop the Turkish invasion’. ‘Rise up for Rojava’ rally opposes Erdogan’s brutal war on Syria’s Kurds: here.

World Peace Council condemns Turkish invasion of Syria: here.

Turkey’s Syrian “rebel” allies, the Islamist Syrian National Army (SNA, formerly the Free Syrian Army), are executing Kurdish civilians in areas they hold, according to multiple reports. Kurdish politician Hevrin Khalaf was executed; her bullet-riddled car appeared in a video surrounded by SNA fighters. Beyond Al Qaeda-linked calls to destroy infidels, the British Daily Telegraph noted, the SNA’s main outlook “is sectarian: they are anti-Kurdish and they are Arab chauvinists” … The Kurdish-led SDF militias in Syria, vastly outgunned by Turkish forces and vulnerable to air strikes, warned US officials in talks leaked by CNN that they would appeal for Russia to attack Turkey and protect SDF and Syrian army forces. As Turkey is legally a NATO ally of Washington and the European powers, such an attack could compel the United States and its European allies to either break the 70-year-old NATO alliance or go to war with Russia to protect Turkey: here.

DEBACLE: HUNDREDS OF ISIS SUPPORTERS ESCAPE Turkish forces approached a key Kurdish-held town in northern Syria, setting off clashes that allowed hundreds of Islamic State supporters to escape from a camp for displaced people and prompted U.S. soldiers to withdraw from a nearby base. [AP]

FIGHTING IN SYRIA HAS ALREADY DISPLACED 130,000 More than 130,000 people have been displaced from rural areas around the northeast Syrian border towns of Tel Abyad and Ras al Ain as a result of fighting between Turkish-led forces and Kurdish militia, the United Nations said. [Reuters]