Sink flight instead of singing flight

Sink flight instead of singing flight

Sparrow (Passer Domesticus). Image: Creepanta / CC BY-SA-4.0

Researchers from North America warn against collapse of birdlife

"Always comes a morning with destructed future", If one liked (almost) the chronic pessimist Michel Houellebecq quote, if one opposes the newspaper or – as in this case – the sides of large trade magazines throughout. The online edition of the Scientific Fachblatt Science is currently waiting for frightening numbers for poor dying; And there is obviously, unlike expected, now also belly, throttle, Fink and Star: So the "Normal" Among the feathered friends.

It is no longer about ornithological expertise, but about our interest. And even diehard biologists are surprised on the results of the analysis published a few days ago, in which around 50 years of field research stuck: For a long time, the populations looked at a long time as threatened for a long time as threatened. This view of the bird world, in the science cuisoon the Avifauna, you will now have to correct.

The study under the title "DECLINE OF THE NORTH AMERICAN AVIFAUNA" (Dick of the North American birdlife) shows one thing on the one hand: the number of wild birds always goes hard. On the other hand, it becomes clear: it concerns the once frequent bird species. Self "Bird of all" – however, in this country of the house sparrow, more even more – are more rare to be found.

Signals of the collapse

From 1970, the number of bird in North America and Canada in the last 49 years was reduced by a total of 29 percent (this shrink of almost a third is the trist of Memento of the study), it is more than 90 percent of the rucks on only twelve Bird groups – such as sparrows, finches and swallows. The inclusion of flat inventory ruling and quantity shifts indicates a net loss of almost 3 billion birds during this period.

The fact that the finding of this unique bird monitoring equals an ecological crisis explains the researchers involved: the widespread (and well-known well-known) bird influence, for example by distributing seeds and destroying dams, not only the food chain, but are also from Permitted for the further okosystem – apart from the joy of plumage and twittering.

The research group also sees the integrity (intimination), functionality and the benefits (services) of the OKOSystem as a whole in danger. And warns the loss of bird richness signal the urgent need to actively deal with the threatening collapse of the Avifauna ("… to Avert Future Avifaunal Collapse"To).

Sink flight – also in Germany

In the short break came from Bavaria, the number of breeding pairs on Lake Constance had fallen by about a quarter within 30 years. We also have the problem before our home tour. House sparrow, blacksaw or star are particularly affected here. Many other species come, such a message from the Max Planck Institute for Behavioral Biology in Konstanz from the beginning of September, only in small, often no longer surviving populations and at ever fewer places around Lake Constance. The researchers also see a similar development in other regions of Germany.

Also from Sudsutschland is the message: especially frequently occurring species go hard to back. The insistence of the houseperette – 40 years ago still the most common way – have been broken by 50 percent since the beginning of the survey (reference year was here 1980). And for himself the floor landscape is considered particularly bird-friendly. Thus, the findings also do not apply to all kinds; Populations suffer especially in landscapes, which are used intensively by humans.

Thus, above all, today’s agricultural landscape is addressed: 71 percent of species living on meadows and fields are partly drastic involvement. The partridge, for example, is now extinct around the Lake Constance. Also predator, meadow peakers and stone owz are no longer available there.

Singing flight instead of singing flight: The field varter (bird of the year 1998 and 2019) is now found on Germany’s red list – a particularly sad case. For generations of pencilers, the trallers of the talented sanger is the indispensable repertoire at least literary nature experience, they face Eichendorff’s romantic meadows, Walder and flashing taler without the lark!

Also qualify the local researchers – entirely on the line with their American colleagues – the continuing shrinking habitat as one of the main causes of the bird dying; Under the causes, the progressive intensification (industrialization) of agriculture is ranked next to the exorbitant flat seal, with a dead-side effect: many birds simply go out the insects. And thus the daily bread for survival.

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