Farmland birds

Insect-eating birds decline where bee-killing neonicotinoids are present

In his book, Dutch toxicologist Henk Tennekes (2010) makes the case that the contamination of surface water by neonicotinoids is so widespread in the Netherlands (and possibly elsewhere in Europe), that loss of insect biomass on a continental scale is behind many of the widespread declines that are being seen, be they of marsh birds, heath or meadow birds or even coastal species. This suggests that we should be looking at possible links between neonicotinoid insecticides and birds, not on a farm scale, but in the context of whole watersheds and regions.

Die Liste der bedrohten Tiere und Pflanzen im Emsland ist lang

Kiebitze (Vanellus vanellus) gehören zu den absoluten Verlierern, sagt Jutta Over vom Nabu Emsland/Grafschaft Bentheim. Sie sind im Jahr 2017 im Emsland kaum noch zu sehen und stehen wie fast die Hälfte der 140 Brutvogelarten auf der Liste der gefährdeten Arten. Over hat für unsere Redaktion zum heutigen Tag des Artenschutzes eine Liste bedrohter Tiere und Pflanzen im Emsland erstellt. Von den 140 Brutvogelarten im Emsland seien fast die Hälfte auf der Roten Liste Niedersachsens als gefährdet eingestuft, sieben davon sogar vom Erlöschen bedroht.

Diese 5 Arten sind in der Schweiz unmittelbar vom Aussterben bedroht

Die Artenvielfalt innerhalb der Tierwelt sieht sich auf dem ganzen Globus einer beträchtlichen Gefahr ausgesetzt: Gemäss aktuellen Erkenntnissen der Weltnaturschutzunion sind von den rund über 63'000 wissenschaftlich erfassten Arten um die 15'000 vom Aussterben bedroht - Tendenz steigend. Auch in der Schweiz werden gefährdete Rassen auf einer roten Liste geführt, um die 500 Tier- und Pflanzenarten sind darauf zu finden.

The Importance of Dose-Time-Response Relationships for Hazard Identification and Limitation of Animal Experiments

Historian Heiko Stoff has recently sketched a fascinating controversy in the 1950’s on chemical risk assessment. Two renowned scientists in the Farbstoffkommission (Dye Committee) of the Deutsche Forschungsgemeinschaft (DFG, German Research Community), pharmacologist Hermann Druckrey and biochemist (and Nobel Prize winner) Adolf Butenandt, were advocates of a preventive risk approach. Only substances with a reversible mechanism of action and dose-dependent toxicology were acceptable in their eyes because safe exposure concentrations below a threshold of toxicity could be defined.

Pheasant numbers are down in North Dakota

The first bad news came in July, when the Game and Fish Department reported a 14 percent decline in the pheasant population index based on spring counts of crowing roosters. Going into breeding season, pheasant numbers were down anywhere from 6 to 10 percent in the state’s primary pheasant regions, Game and Fish said. Results from the department’s annual roadside pheasant survey in late July and August showed pheasants observed per 100 miles were down 61 percent from last year. Brood counts were down 63 percent, and the average brood size was down 19 percent.

Door gebruik neonics zijn kievit en scholekster in 5 jaar tijd 90% achteruit gegaan in de Hoeksche Waard

De weidevogelgroep van Hoekschewaards Landschap houdt zich bezig met het beschermen van weidevogelnesten en jonge vogels bij werkzaamheden op het land. De weidevogels in zijn algemeenheid hebben het erg zwaar de laatste jaren in Nederland. In de Hoeksche Waard komt daarbij dat de vogels die op akkerland broeden, kievit (Vanellus vanellus) en scholekster (Haematopus ostralegus) , extra hard getroffen worden. Vanuit diverse onderzoeken komt duidelijk naar voren dat de neonicotinoïden hier debet aan is. Hierdoor zijn er voor de jonge vogels te weinig insecten waardoor ze verhongeren.

Friedrich Nietzsche (1844-1900) in zijn boek Aldus sprak Zarathoestra: 'Blijf de aarde trouw'

In de afgelopen decennia is hier in Nederland bijna ongemerkt tachtig tot negentig procent van de insecten verdwenen. ,,Hier voltrekt zich een ramp", zegt hoogleraar natuurbeheer en biodiversiteit, prof. Frank Berendse. Het gaat niet goed met de insecten, zegt hij, met name niet in agrarisch gebied. Het aantal insecten is sterk teruggelopen. De biomassa van vliegende insecten is met 80 tot 90 procent afgenomen. En daar blijft het niet bij. Die insecten dienen weer tot voedsel voor veel andere soorten dieren. Broedvogels hebben insecten nodig om hun jongen groot te brengen.

Pheasant counts decline in North Dakota

R.J. Gross is upland game management biologist for North Dakota Game and Fish, and said a roadside pheasant survey shows that total pheasants (Phasianus colchicus) observed per 100 miles are down 61 percent from last year. Brood observations, meanwhile, were down 63 percent and average brood size was down 19 percent. The survey is based on 279 survey runs made along 103 brood routes across North Dakota.

“Brood data suggests very poor production this spring when compared to 2016, which results in less young birds added to the fall population,” Gross said.

Farmland birds are in decline after Bulgaria´s accession to the EU in 2007

Based on monitoring data for the period 2005-2010, we studied the trends in abundance and species richness of common breeding birds in Bulgaria before and after the country joined the EU in 2007. We analysed the trends in birds of farmland, woodland and “other” habitats, and additionally, we tested whether indices of the commonest birds are representative of wider changes in bird populations. At species level (n = 32), significant declines were detected in 11 species (34%), and increases in just two (6%); 19 species (60%) had uncertain trends.